Princess Bubblegum: A scientist, a princess, a being made out of candy... Princess Bubblegum was a lot of things. At the moment, however, she was also deeply troubled. Her workaholic lifestyle had made her jumpy to be more efficient with her time, and in a rushed decision she had ordered her banana guards to install a mini-lab in her bedroom so that she would be able to experiment and do science the moment she got out of bed. Of course nothing that Bubblegum ever did was mini, the lab turning out to take up half her living space rather than a few flasks and microscopes on a desk that a reasonable person would have. One part of her room had her bed, wardrobe and other princessly necessities that she required, while the other was filled with shelves of bubbling, boiling, coiling and spoiling substances of various kinds, not to mention all the sciencey equipment.
That's not what troubled her, however. She loved the lab! But experimenting in her pyjamas isn't as safe as experimenting in a lab coat, something she found out in the middle of the night while trying to develop a new candy growth serum for her subjects. A clumsy mistake as she was turning around and the pink liquid had splashed all over her bottom, soaking into the fabric and PB underneath it. Much to her joy and distress the candy serum was effective, her rear beginning to swell up inside her pyjamas until it burst free, the jiggling cheeks getting larger and larger.
In the end she had retreated into her bedroom side of the room, having torn off her PJs so that she could deal with this new dilemma. Her ass had grown to look like two large beach balls, and her thighs were just a little bit smaller. The rest of her body was fine, though she couldn't find any way to remove her panties which were digging into her crack. No way she could meet her subjects looking like this! She didn't even have any clothes that fit! Dragging out a chest of various old vials and experiments she started to rummage through it, looking for a way to return her body back to its old size.

Marceline: As this was happening, a certain vampire queen was floating outside PB's window. Marceline hadn't seen or heard from her girlfriend in the longest time, and while she understood that Bonnie could get to be too busy to talk at times, she also knew that her sugar-coated sweetheart didn't take as many breaks as she should. This had led to her flying up to the princess's window, pushing it open, and entering.
The sight that greeted her was one that Marcy hadn't expected. Looking around, she saw a huge pair of pink spheres wiggling from side to side, connected to what looked like small pink tree trunks (not the sweet old elephant)... The vampire queen's breath caught in her throat as she realized she was looking at PB's butt! Peebles had always had a bit of a booty under that magenta gown of hers, but this was way bigger than what Marcy had seen or felt.
But still, as she stared, Marceline began to smirk lewdly. It was such a big, fat, juicy booty. Big, jiggly, and sexy! The aroused vampires floated over, enjoying the view of PB's too-small panties stretched so deliciously tight over her nethers, swallowed up by her ass crack; and gave her girlfriend a good, hearty slap on the ass, causing it to ripple and jiggle wildly. "Hi, Princess Bubblebutt!" she cackled as she watched PB's rump wobble. "What kinda mad science are you doing now?"

Princess Bubblegum: Candy removal, candy removal, candy removal... The process of picking up bottles and putting them back down was getting tiresome and she was slowly starting to accept the fact that she'd end up spending the rest of the night creating a new serum to battle the one that had bloated up her lower body when unbeknownst to her a visitor floated in through the window. She became very suddenly aware of this as a loud crackle erupted behind her, together with a harsh sting that almost pushed her off balance. Her hands quickly grabbed onto the edge of the chest, her head jerking up as she shouted out in flustered confusion. "AH!" She reached back to hold her asscheeks still, standing up straight and turning around to see who had smacked her so. Oh no. Why her? "Marceline! What are you doing here at this hour!?" The sting from the slap quickly dissipated, but rubbing her plush rear PB knew that it must have dented her ass deeply at the moment of impact. Blushing and not sure if she should be furious or not she pointlessly tried to hide her new shape. "It's not mad science, it's a mistake. That's what it is."

Marceline: "Oh, really?" Marceline smirked as she enjoyed the show of her girlfriend trying in vain to hide her inflated bottom. "So you're saying you weren't trying to make yourself look even cuter for me? Because if you were, you've succeeded." As she spoke, Marcy floated around PB, her eyes scanning up and down the princess' body. Such a ridiculous pear shape, and yet so alluring. She snickered inwardly as she noted the handprint she'd left from her initial slap to Peebles' booty. "I'd ask if we could both use it for a seat, except I don't use furniture anyway." She giggled, giving PB's swollen ass a poke.

Princess Bubblegum: It would have been bad enough with Marceline gawking at her but now she had to tease her too? PB felt her face flush up even more as the vampire queen began to circle her, trying to spin around so that she wouldn't have her back turned to her but Marcy was too fast. In the end Bubblegum just stood there, fists clenched by her thick thighs while trying not to blow up from embarrassment. Unlike her girlfriend who reveled in showing off her body, apparent by the tight shirt shoving the cleavage of her head-sized tits, PB was not in her comfort zone. "I'm telling you, it was a mistake. You get that I can't walk around like this, right?" Marceline would find out that the pink flesh was indeed incredibly soft and it'd be hard to not start groping the asscheek after that one poke. Not that PB would let her though. "While you're here you might as well help me work on an antidote for this stupid butt. I need you to fetch me a few of those vials I was using before, I don't dare to go near them in case I knock one over again." she said and pointed towards a few beakers, most filled with pink liquid.

Marceline: Marceline laughed softly, floating over and kissing Bubblegum softly on the cheek. "Hey, don't get all bent out of shape, Bonnie. I'm just teasing. You're so cute when you get all flustered like that." She was still admittedly disappointed that PB wouldn't be keeping her enlarged asset, but Marcy still went over and did as she asked, floating over to where the other indicated.
As she pulled back with a few test tubes of the serum, Marceline's ample bust collided with another beaker. The container toppled over, and she yelped as the contents spilled all over her pants. Well, not all over. Mostly her crotch. Marcy let out an irritated sigh as she floated back over to PB. "Guess we both had a little spill, huh?"
Suddenly, her pants started to feel incredibly tight. Was this the stuff that Bonnie needed? Making her pants shrink? No, wait. It was her ! Marceline could feel an intense warmth in her loins as the button on her pants popped off, her zipper forcing its way all the way down. Her panties bulged heavily outward as something extended from her groin. A very long, very thick something.

Princess Bubblegum: "I'm not cute!" she responded defiantly, but at that point Marceline was already over at the lab and all PB could do was blush and let the butterflies in her stomach make a ruckus. Stupid hot vampire girl who gives nibbly smooches with those little cute teeth of hers... She was brought out of her pondering by the sound of glass clacking against a counter and Marcy floating back, visibly disturbed by something. Bubblegum's eyes went wide as she saw the pink stain soaking into her girlfriend's jeans, recognizing the substance immediately.
"Marceline what have you done!?" This was such a rollercoaster of emotions PB wasn't sure if she would be able to handle it. And it would only get more intense, as the crotch she was staring at started bulging outwards, the button popping off and hitting her on the forehead. Nothing could distract her from looking at Marceline's crotch growing, the stained black panties distending as her girlfriend's gray package strained the fabric. "Nooo, I can't believe this is happening!..." she groaned, though her eyes never left the sizeable bulge in the vampire's crotch which was now threatening to rip the panties.

Marceline: Marceline could only groan in response as her futa vampire cock grew larger and larger, surging up and out of her panties as it continued to swell, growing larger and thicker with every passing moment. Within a minute, the massive dick towered over the two women's heads, easily twice as tall as Marcy herself and as thick as PB's waist was now.
But the changes weren't done yet. Marceline let out an even louder moan as the underside of her jeans began to bulge even more than the front had. The bulge grew bigger and bigger, until there was a mighty RIIIIIIP, and a pair of testicles easily as big as PB's butt cheeks dropped down between her legs, her panties now stretched to all hell.

Princess Bubblegum: Ideally, PB would have thought of a way to help her girlfriend from ending up with a cock larger than the width of her own hips and done something while the growth was happening, but instead she was stuck staring as it only grew and grew, the gray flesh surging up in size until it was impossibly large. She was just about to say something when Marcy groaned again, the view of two enormous gonads appearing silencing PB once more.
Well for one thing, those panties wouldn't be saved. It was amazing that they even held for the two nuts, though tears could be seen here and there in the fabric. Finally Bubblegum knew what to say, and that was "Aaaargh!". She threw her head back and put her hands to her face, audibly groaning as she tried to desperately concoct a formula in her head that would fix this, while simultaneously not getting herself distracted by the attractive person in front of her.

Marceline: Marceline floated there in front of her girlfriend for several moments, panting from the intense warmth she now felt all over. Her enlarged cock pulsated angrily, utterly rock-hard. With every throb, Marcy let out a soft groan as her slender hands instinctively began to caress the monstrous dick. It felt...amazing. Like nothing she'd ever felt before....
In the next few moments, the side effects of the formula began to reveal themselves. Apparently, it stopped at simple expansion for candy-based beings, but for Marceline, the potion also triggered a drastic increase in hormonal activity. As she hovered in the air, her colossal testes swaying to and fro, the vampire queen's groans began to increase in volume, growing needier and needier. Her nuts were getting heavier by the moment, and the intense warmth she felt in her nethers only seemed to be growing stronger. Marceline began to pant raggedly as she tried to alleviate the feeling by rubbing her cock, but to no avail.
She needed release.

Princess Bubblegum: Now it wasn't uncommon for Marceline to play scary or intimidating, but with the new additions to her body even PB had to admit that she was being a bit worried being in the presense of her girlfriend. Not that she thought Marcy would hurt her, oh no. The vampire was sorta meek when it came to that (though apparently that didn't stop her slaps from packing a punch). But being presented with a dick twice your size has to invoke some emotion.
"Hey Marcy?" Bubblegum asked, concerned. It sounded like the growth had injured her, with all the strange groans the poor woman was making. "I know it looks bad but we can still work on an antidote and... Are you okay?" PB carefully placed her soft hands on each side of the shaft, the engorged head in her face, and held it to the side so that she could look at her troubled girlfriend.

Marceline: The feeling of Bonnie's soft, delicate hands on her member sent shudders up and down the vampire queen's spine as pre began to ooze from the tip. She looked back at PB through half-lidded eyes, slowly running her tongue over her lips. The princess had such a gorgeous figure, even more so now, with her inflated rump...
"Mmmm, better than okay, Bonnie," Marcy purred as she floated forward, reaching out and cupping her lover's face. "But I could use a hand here...I need you, Peebles. I need you so badly~"

Princess Bubblegum: PB wasn't sure what she should focus on; the aroused Marceline looking at her like she was a piece of red strawberry meat or the fact that a dollop of pre began to run down the cockhead which she was so close to. It was a bit hard to just call it a dollop though, since the clear drop looked to be almost a whole gallon. Luckily Marcy didn't wait around closed the distance between them, Bubblegum's hands sliding along the shaft until they were up close. 
Her mouth felt dry as the vampire queen reached out to touch her, the desire that Marceline felt for PB easy to note and oh so arousing. Even though there was still a foot between the pair Bubblegum could feel heat emanate from the enormous balls, making her even more thrilled. "Well, um..." she replied, stifling a bewildered laugh, "...I think I can help with that." She smiled back, gave Marceline a quick peck on the lips and then turned around, bending over slightly. "These might work better than my hands though, right?" PB said, offering her crack.

Marceline: Marceline eagerly reciprocated the kiss, moaning hungrily into PB's lips, breathing rapidly through her nose. The heat she was feeling only increased as Bonnie turned around and bent over, sticking that sexy, round, pink booty out at her. The vampire queen needed no further invitation, squashing her gargantuan cock in between the incredibly soft cheeks and grinding it against them. It felt amazing, eliciting more whimpers of arousal from Marcy. As she continued to hump her girlfriend, she reached down and grabbed two generous handfuls of the jiggly pink flesh.

Princess Bubblegum: PB's hands went around to the back to grab a hold of her round, plush asscheeks, looking over her shoulders as Marceline lined herself up. An idea struck her and she began to clap her ass together, enjoying the reaction she got. And then Marcy pressed her cock deep down between her cheeks, eliciting a yelp from Bubblegum which was quickly silenced by her biting her own lip. Not only was there a huge, throbbing mass running along her ass and back, poking up over her head, but Marceline grinding against her meant that her panties were being stretched more and the fabric had started to press against her nethers. Her hands still jiggled her asscheeks but otherwise PB did her best to remain still, each little movement making her underwear slide against her.

Marceline: The clapping of her bubblegum buttocks only increased Marceline's pleasure, being met with louder and louder groans as waves of pleasure arousal washed over the lustful vampire. She continued to slowly move her dick back and forth through Bonnie's ass crack, enjoying the sounds of the princess' whimpers as her undies rubbed against her pussy.

Princess Bubblegum: As Marceline started to properly enjoy herself Bonnie also began to relax, finding the sensation of her panties sliding into perverted and... good. The warmth of her girlfriend's dick was also arousing, heating up her body, ass and asshole alike. Seeing as Marcy was also already making a lot of noise she didn't see any harm in letting out of a soft moan, eyelids fluttering. Only that something warm, sticky and liquid suddenly poured down her back, making her gasp and look over her shoulder again. She'd have to let her eyes wander upwards however, as the fluid was obviously pre running down the shaft. "Marceline!" she exclaimed, ready to berate the vampire, but after a short moment of hesitation she allowed her voice to soften and suggested "I think you can use your ejaculate to... lube up my ass, if you want to...~".

Marceline: Marcy perked up instantly at those words. "Well… Don't mind if I do, Peebles," she cooed, floating back and pulling her cock free of PB's massive booty. Pointing her dick at her girlfriend's ass, Marceline floated forward again, pushing the leaking head of her prick in between the massive, pillowy ass cheeks. Her pre wasted no time in utterly soaking the princess' panties as Marceline started to drag her head up and down between PB's buttocks.

Princess Bubblegum: The fact that Marceline got so delighted by her suggestion made PB let out a quiet laugh, her hands once again spreading her cheeks but this time not clapping them together again. She refrained from looking back and instead stared down at the floor, panting lightly in excitement. "Ah!~" The cockhead went far between her huge buttcheeks, almost threatening to actually push into her anus had it not been stopped by her panties. The combined feeling of getting her asshole slathered with pre and her undies grinding into her pussy made her start moaning louder and letting go with her hands she let her fingers join in on pleasing her as well, using two to rub along her engorged, wet lips.

Marceline: Marceline grunted with desire as she continued to rub her gigantic cock head against PB's butthole. The princess' soaking panties felt amazing against her dick, but Marcy still needed more. "Mmmmhhh… Bonnie… I need you… I want to get inside of you.~"

Princess Bubblegum: Just as Marceline drew pleasure from Bonnibelle's soaked underwear so did the candy princess when it came to the hot dick squishing against her asshole. She had just intended to get her cheeks lubed but Marcy's grinding was almost like she was teasing her. "You mh~ sure? I don't think I can fit /all/ of your cock!" she replied between breaths, her ass clenching around the shaft to make it even more irresistible. It was true though, the dick was massive and it'd be one hell of a feat to take it.

Marceline: She whimpered with arousal as PB clenched her ass around Marcy's cock. "Let's find out, then," she breathed, before thrusting her hips forward with incredible force, her massive testes swinging forward with the motion and smacking against Bonnie's thighs. The vampire queen thrust with such force that she tore a hole in the candy princess' panties, stretching her asshole mercilessly, as well as her stomach, which bulged cartoonishly out around Marceline's cock.

Princess Bubblegum: "AH!" Suddenly Bonnibel found herself speared on several feet of hot, throbbing vampire cock, her asshole immediately clenching around the intruding member but only managing to squeeze and stroke it due to its softness. Her panties were beyond saving, now sporting a huge hole that the shaft was plugging and it was for the best, since with the size of PB's rear end it would have been very difficult to remove her underwear. Now Marceline's cock wasn't just large, it was huge and one could easily see the head of it stretch out Bubblegum's skin, the pink flesh wrapped around the bulging mass and massaging it inside. "I-It's massive!" the princess shouted, her whole body twitching around the dick unlike anything Marcy had experienced before. And there was still a lot to go, though judging by how her still jiggling asscheeks were handling it Bubblegum might just handle it.

Marceline: Marceline groaned loudly with arousal as she felt Bonnie's soft, squishy ass clench around her member. It felt absolutely heavenly. And that was only a portion of her cock. She needed more! The vampire queen cooed pleasurably as she slowly pushed her dick further and further up PB's butt, reaching out and groping her fat pink ass as she did so. She even gave it another smack, gently biting her lip as she felt the sensation of the jiggling candy flesh against her prick.

Princess Bubblegum: With the rough penetration starting it the slow push made it all feel incredibly pleasant, PB letting out tiny moans and squeals as inches after inches disappeared into her pink anus. As Marcy slapped her cheeks they almost wobbled like pudding, and with all the shiny precum covering them they even looked the part. Bubblegum's breaths got more and more laboured for each second that passed, the cockhead making its way up her stomach and reaching her chest before she managed another string of words. "You're getting nnh~ pretty far in Marcy!" she warned. Not that it was a request to stop though, especially since her asshole was still twitching and tugging on the shaft, and her hands had absentmindedly gone up to stroke her belly. Or rather, the dick inside of it.

Marceline: Marcy shuddered as she could actually feel PB's hands on her shaft through her stomach, which prompted her to push even further in, continuing to squeeze and knead at the pillowy, jelly-like ass flesh. "I wonder if I'll be able to pop out of that pretty pink mouth of yours." Marceline laughed, giving the other butt cheek a smack.

Princess Bubblegum: "Hehe, yeah mm." Bubblegum herself giggled, though it quickly became more concerned as the cockhead kept on pushing, going further up. Since her girlfriend seemed to like what her hands were doing she even began to stroke the cock through her skin, sliding her hands up and down along her belly and feeling the beast inside throb against her fingers. "Marcy? Ma-nhg!" she said with concern, the head having quickly reached her throat before the obscenely large thing could be seen stretching it out, widening quickly and cutting off whatever she had planned to say. Hard to blame the panicked look on her face when that happened.

Marceline: Marceline groaned loudly as she felt Bonnie's tightness around her cock while it continued to push upward, until she felt her cockhead pop up out of Bonnibel's mouth. She gasped excitedly as she felt the vibrations of PB's attempts to speak past her dick. "Oooh, do that again, Peebles." she cooed. "That feels so goooooood.~"

Princess Bubblegum: Sadly, the only thing Bubblegum could do was gurgle, but it was likely that would be enough for Marceline since it still sent vibrations down her sickeningly thick throat. And so she did, making muffled sounds that might have sound slightly panicked if not for the fact that it felt /sooo good/. Her hands had moved up to stroke her throat, both to pleasure the vampire queen but to also feel how much she had to stretch to fit the entire girthy rod. Her asshole remained spacious however, clapping around what was rest of Marceline's gargantuan member.

Marceline: Marceline shuddered with pleasure as Bubblegum continued to gurgle and rub at her shaft from the outside. After a few moments of that, she began thrusting in and out of her candy girlfriend, her hips slapping against Bonnie's ass, her balls against her thighs. Her throbbing member slid in and out of the princess' mouth, still oozing with pre.

Princess Bubblegum: Bubblegum's entire body clenched at having the entire cock pull back, the head almost going back inside of her mouth before Marceline thrust forward again. Stars flashed in front of her eyes from the rush of ecstasy and more would come as Marcy got up to speed. Each thrust made her luscious ass and thighs wobble, wet smacks filling the room. A small river of pre was already running down her throat and stomach, and it was bound to become more now that she had become the perfect cocksock for her vampire girlfriend.

Marceline: Marceline's tongue lolled out of her mouth as she gasped and groaned euphorically, adoring the feeling of her lover's inflated backside jiggling against her own flesh as she continued to piston her massive cock in and out of PB's asshole. Her balls churned with gallons upon gallons of spunk, just begging to be released...

Princess Bubblegum: Similarly PB's body was nearing release, the intense anal fuck enough to drive her libido crazy just as much as her vagina would. Pink-tinted fluids were already rolling down her fat thighs and after a particularly nasty thrust from the vampiress she began to squirt, sticky sugary juices splattering onto the floor below. Her body convulsed and trembled around the cock inside of her, asshole quivering, and the garbled noises got a lot louder and satisfied as if she was yelling in ecstasy.

Marceline: Oh, the ecstatic yelling only brought Marceline closer to her own climax even faster. She kept thrusting, moaning excitedly as her cock pulsed more and more. Finally, her balls clenched, and the vampire queen cried out blissfully as she suddenly pulled her cock back into the princess as a deluge of thick, sticky semen gushed from her dick.

Princess Bubblegum: Being fucked through her climax was heavenly and the intensity of which Marceline did it had PB reeling from bliss. Her eyes had almost rolled back into her head when the cock was pulled back much more than before, the head popping back into her mouth and forcing its way back down her throat. It went far enough to go down to her stomach, leaving Bubblegum confused and orgasming even harder before her innards were blasted with the rich alabaster jizz Marcy's balls had churned up. The heat of the cum sent Bonnibel into ahegao but strangely enough the cumshots that distended her stomach didn't seem to add up. Instead Marceline would notice that Bubblegum's ass began to rapidly swell, wobbling and growing larger and larger.

Marceline: "Oooohhh~" the lewd vampire queen grinned with delight as she watched Bonnie's ass inflate even more, actually seeming to grow softer in her hands. "I think your sexy bubble booty likes my jizz, Peebles!"

Princess Bubblegum: They almost seemed to swell like water balloons, which might seem appropriate since it was easy to tell where the cum was going. Bubblegum was too busy panting and moaning to even reply, her tongue hanging out of her mouth and drool running down her pre-stained chin. Amazingly enough her legs still stood, albeit a bit shakily.

Marceline: As her dick finally stopped blasting cum all over PB's insides, Marceline slowly pulled out of her, smacking her lips in satisfaction as she admired her handiwork. Bubblegum's butt looked to have at least doubled if not tripled in size from the climax, looking even squishier and more jiggly than before. Licking her lips, Marceline floated over and grabbed two huge handfuls of the soft pink flesh, even rubbing her own cheek against one of Bonnie's buttocks.

Princess Bubblegum: "I can't... believe how... great that felt..." Bubblegum said between breaths, wincing and twitching as Marcy's enormous cock started to pull out. A stream of jizz followed the head as it popped out but it was noticeably less than one would have expected. Probably because somehow all that cum had ended up in PB's butt, filling it immensely. Finally she let herself look backwards again, barely seeing her girlfriend due to the enormous pink spheres being in the way but still feeling her ass being played with. "Ngh~ I've gotten so big!" Indeed when Marceline squeezed her candy rear it was as if she squeezed a water balloon, only it was a lot thicker, warmer and not prone to splashing. Bubblegum seemed nothing but delighted, her face red in arousal and beaming with satisfaction.

Marceline: "Yeah you have," Marcy giggled as she gave the princess' butt another smack, setting it wobbling like jelly. Jelly during an earthquake. "And I think you're gonna just keep getting bigger!~" The vampire queen floated around in front of her lover, grinning lewdly as her cock already began to harden again, rising up so that the head was level with Bonnie's face. "C'mon, babe; gimme a kiss." she chuckled, clearly referring to her dick, not her mouth.

Princess Bubblegum: "Eep!" Bubblegum would have blushed harder had her face not already been a deep red, and looking back she could see the almost hypnotic way her butt was moving. Heck, she couldn't just get herself turned on by her own ass, she needed to be more in control of herself than that. A gallon or two more of cum splurted out on the floor from the spank but it did nothing to make her behind smaller, Marceline having cum so much more. Being presented with the throbbing dickhead made PB's mouth water, and she leaned forwards to kiss it before stopping herself to say "Don't go shove it in though! My mouth is not my ass." That didn't stop herself from pressing her lips against the slit and lick along it, hands starting to stroke just below the glans.

Marceline: Marceline shuddered with pleasure as she felt PB's soft lips against her cock, mewling with arousal as she ran her tongue along the throbbing erection, stroking her hands along it. "And… why's that?" She asked between moans. "You seemed to love it when I was sticking it out your mouth.~"

Princess Bubblegum: "W-Well uhm..." she said, pulling back momentarily. "Yeah. But I didn't expect you'd do it!" Her tongue started to lap all around the head, licking up residue cum from when it had been in her ass. It gave her idea to try clenching her asshole, which not only produced a lewd squelch but also made her cheeks move, now even more apparent since they were so large. "You seemed to like it too, don't think I didn't notice that." she retorted and returned to dragging her tongue along the cockslit, gathering up more cum in the process.

Marceline: "I'm not denying that," Marceline laughed, bucking her hips forward so that the throbbing head bumped PB lightly in the face. "And you clearly love the taste of this baby~"

Princess Bubblegum: "Mmfh!" PB had to take a step back, her ass wobbling just from that, as the tip of the head threatened to push into her mouth from Marcy's movement. "My asshole did, and there's a difference." she said. "...Though while it wasn't candy it did taste pretty good. I mean, not that I had much time to think about that." she added bashfully, returning to servicing Marceline again.

Marceline: The vampire queen smirked deviously. "Well, I think you need a little more time to think on it, then!" She suddenly thrust her hips forward again, this time shoving her cock into PB's mouth, grinning as she watched her girlfriend's throat bulge out from the massive insertion.

Princess Bubblegum: "Y-NGH!" PB found herself once again with her mouth overfull of dick, though this time the rest of her body tightened around nothing. Marceline would probably fix that though, quickly cramming in more and making her throat stretch out around the head. Surprise turned to glaring, which quickly turned into acceptance and then joy as Bubblegum began to swallow around the enormous member, her hands stroking the shaft and goading it deeper into her body. Seems like she might have been more of a size slut than she let on.

Marceline: Marceline grinned wider as she watched Bonnie's expression go from irritation to bliss as she pushed more and more of her cock down the princess' throat. "Mmmm, I love how much of a slut you've become Peebles." she snickered as the base began to near. She hadn't yet popped out of PB's butthole yet, but that would be fixed soon enough.

Princess Bubblegum: With PB's rear having taken all the cum it was now easy to see the cock descend into her, the candy princess leaning forward to make it easier for Marceline to shove it deeper. An annoyed grunt came from her when Marcy called her out on her appreciation for dick but then she rolled her eyes and decided to show what being a slut really meant. Her hands started to stroke the remaining part of the shaft fast, Bubblegum putting in extra effort to suck and slurp on the length and even rub her tongue against the underside. "Mmm.~" She alternated between moaning and swallowing around the girthy cock, sometimes looking up to give Marceline sultry glances.

Marceline: The lustful vampire queen grinned as she closed the distance between her hips and Bubblegum's face, tangling her hands in the princess' pink hair. With a lewd squelch, Marcy's dick popped out of Bonnie's anus, effectively turning her into Marceline's uber-bottom heavy cocksleeve.
"I could just stick my dick in you all day, bubblebutt." she hummed, pushing PB's face even further into her crotch.

Princess Bubblegum: With Bubblegum's ass being so incredibly large, Marceline got to feel plenty of pink flesh around her cock even when outside the candy princess' body, the cheeks pressing against the head. To make use of this PB continued to work her behind, squeezing the length with her soft skin. 
Since her lips were pressing flush against Marcy's crotch there wasn't any more shaft to stroke, but that wouldn't deter the aroused woman. She glanced up to Marceline to see the reaction to have her balls touched, PB starting to fondle and rub the skin.

Marceline: If the feeling of PB's butt around her shaft wasn't arousing enough, now Marcy had her groping her huge, churning testes. The vampire queen threw her head back and moaned even louder as waves of pleasure shot through her body, bucking her hips against the candy princess, smacking her hips against PB's face. Pre dribbled out of her dick like a broken faucet, getting all over the inner walls of the canyon that was Bonnie's butt crack.

Princess Bubblegum: Despite getting Marceline's hips slamming into her head over and over PB was enjoying herself immensely. In fact getting facefucked so hard was arousing in of itself, her whole body shaking whenever the vampire queen thrust forwards. She felt warm all over, especially in her rear which was soaked which got even more soaked in pre than before. To return the favor she fondled Marceline's balls with even more ferocity. She pressed herself against the weighty orbs, feeling them radiate heat and potency, and her attempts to slurp on Marcy's shafts got more intense. Hmm, maybe she could science up some potion to turn it into candy, or at least get the same taste. On the other hand she did love the taste of her girlfriend's dick as it was.

Marceline: The continued fondling of her balls was certainly urging Marceline toward her climax faster. "Oh yeah." she panted, her tongue lolling out of her mouth, "I'm gonna fill you up real good!" The vampire's cock throbbed harder and harder, her balls sloshing with untold gallons of sperm. Finally, Marcy felt herself about to come.
With a grunt, she pulled back, pulling her cock head back inside PB, until it was about halfway through her body. With a loud groan of ecstasy, she released her massive load all over the princess' insides, flooding her belly with as much cum as she had for Bonnie's booty.

Princess Bubblegum: Being able to simply /hear/ Marcy's balls being filled with so much cum sent shivers down Bubblegum's spine, her hands groping the massive orbs intently and pressing against their sloshing surface. She could tell that the vampire was getting close, the rough facefuck, churning gonads and pulsating dick giving it away. PB sucked on the cock as much as she could, clenching herself to make her soft bubblegum flesh as tight and good feeling as she could.
The geyser of jizz hit her insides with such force that it distended her pink belly far from just the cum blasts alone, PB's eyes rolling into the back of her head as she got filled up like a condom. A surprisingly well working condom, since no jizz splurted out from her asshole as one would expect from such a huge load. Instead her ass began to grow again, only this time her belly joined in on it too. Her thin frame grew more curvaceous, thighs getting thicker to accommodate her wide ass. Apparently that wasn't enough either since her round, pink breasts slowly started to swell and began to pick up speed. And as all this was happening PB was in a state of ecstasy, happily guzzling down all the cream her girlfriend poured down her throat.

Marceline: PB's top began to strain and tighten around PB's swelling tits, her nipples wasting no time in pressing up against the fabric. The garment rode up her inflating belly, which was already far past the point of appearing eight months pregnant, now looking more like she was having octuplets- very fat octuplets. And of course, she would have wide hips to accommodate such. Her panties were beyond ruined by this point, her ass now large enough to crush her four poster bed. Still, her tits and belly continued to swell, her shirt stretched to hell as it became now little more than a bra, and even that wouldn't last. Her belly was now about the size of her ass before Marcy had buttfucked it even bigger, bulging outward like she was smuggling a giant beach ball. Her boobs were maybe three-quarters that size, nice and round and perky.

Princess Bubblegum: The hands that had been groping Marceline's nuts quickly went over to PB's chest as it began to swell, hungrily fondling her nipples and then just the boobflesh once the pink nubs were out of reach. In the lustful moment Bubblegum couldn't care less of the consequences, the gushing of cum down her throat together with the feeling of her ass swelling heavier too good to deny herself. She could feel her gut grow and it didn't take long until it pressed against the ground, squishy like the gum she was made of. It wasn't until her boobs had gotten past the size of her initial ass that Marceline's flow began to taper out, the blasts of jizz lessening to mere dribbles. And judging by what could be told from Bubblegum's stretched face, she had loved it.

Marceline: Marceline let out a pleased groan as she slowly pulled her dick out of her girlfriend's mouth, strands of saliva stretching between them as she floated back. The vampire queen giggled lewdly as she admired her handiwork. Such huge, fat tits and a gorgeous, swollen gut; not to mention an even bigger, fatter ass. Marcy licked her lips as she repositioned herself where she looked like she was laying on her stomach in midair, floating forward to claim PB's lips in a kiss. "You're such a pretty, plump princess," Marceline cooed.

Princess Bubblegum: Bubblegum didn't stop sucking just because the dick had stopped shooting, though she didn't try to devour it like a starved beast either. When the head popped out she lost any resemblance of balance though, her full weight going onto her gut and even with her incredible absorption skills there was no avoiding a glob of thick jizz from splashing out of her mouth. She quickly closed it and swallowed down what was gathering up in her cheeks, shifting her weight away from her gut so that the pressure wouldn't be too much. The kiss was happily accepted and once over she pushed herself back onto her enormous rear, the thing looking like a huge sofa of jiggling assflesh. Her tits rested on top of her bulging gut, the sweetest look on PB's face. "I'm not /that/ plump." she said and looked down, thinking for a bit and then shrugging. "Okay, I am. And I got bigger tits than you now!" she said teasingly, trying to lift up her boobs but just ending up sinking her fingers into her skin.

Marceline: "Yeah you do." Marceline grinned, groping her bubblegum lover's enlarged tits before moving down to press a few kisses to them as well. "I love the new you, Bonnie. So big, fat, jiggly, and sexy!~ I could just feel you up all day and night."

Princess Bubblegum: Bubblegum let out a happy chirp at having her boobs groped, and even more happy noises came from her as Marceline started to kiss them. "Oh hehe well you aren't too bad yourself Marcy. But I don't think my kingdom would allow me to spend every waking hour in bed with you..." she said, voice trailing off... before she unexpectedly grabbed Marceline by the head and forced her face first against her breast, the vampire's head squishing against her areola and nipple. "But a day or two won't hurt!" She didn't let her partner go for several minutes, intending to get her properly aroused before finally letting go, releasing her from the sweet flesh. "Thoughts on that?"

Marceline: The vampire queen let out a surprised cry as PB shoved her face into her soft pink bosom, humming with delight as she gently nibbled at the pliable bubblegum flesh, sucking lightly at the nipple (it was pretty much red! Yum!).
When she was finally allowed up for air, Marceline gave Bonnie a fanged grin. "Well, we're not in bed right now, are we." she giggled. "What if I became your royal attendant? A princess does need someone to cater to her needs, after all." Of course, it was obvious that Marceline didn't really care about that. She just wanted an excuse to be as grabby with PB as she wanted, and of course, stuff her with her fat vampire cock.

Princess Bubblegum: "Pfft, as if you could ever hold a position of responsibility. You'd be flying out of the window the moment I needed you for something other than sex!" she said with barely contained giggled, giving Marceline a nudge with her chest. "Sex and cuddles, at least. But for now, sex is what is on my mind." For someone who had been so serious about getting a cure PB had really done a full 180, reaching out to squeeze the vampire queen's chest in return. "Or what, does that new cock of yours only come with two loads?"

Marceline: Marcy smirked, putting her hands over PB's as she grabbed her chest. "Oh, I could stuff you with my cum until the sun sets Peebles. But I don't know if your room could handle that much of you!"

Princess Bubblegum: "That's quitter talk Marcy. And I know you’re not a quitter." She gave the two tits in her hands a final squeeze before grabbing Marceline's own hands, using them to pull the vampire closer and give her a new kiss. "I'm more worried about you not using your, erhm, cock than the castle breaking." Seemed like her manners hadn't been completely fucked out of her yet. "Want to do my nethers next? I have honestly no idea what will get bigger then."

Marceline: Marcy's grin only grew wider at that. "Let's save that for last, babe. But I think your titties could be a bit bigger...~" She pulled away and prodded one of PB's boobs with her cock, the head sinking into the pink flesh.

Princess Bubblegum: "Oh? Oooh... Ooh.~" PB bit her lip in arousal as the enormous cockhead squished her breast, sliding over her stiff nipples and swollen areola. They were almost like water balloons in consistency, only that Bubblegum could feel every inch of dick that slid against them. "How are you going to do that? I don't believe there is an available orifice unless you intend to use my mou-ah, well, that works too." Her face flushed deep red as she realized Marceline's intent, using both hands to lift up the breast she had been toying with.

Marceline: Marceline giggled, nodding. "You're a smart girl Bonnie," she said before pushing harder into PB's teat. After a few seconds of pushing, the vampire queen gasped in excitement as her dick found the tiny hole in the nipple, instantly pushing into it and stretching it wider so her cock could fit. Bubblegum's breast distended comically as the phallus was inserted, now incredibly asymmetrical. Marceline groaned with pleasure, giving her lover a sultry wink, before beginning to thrust, pushing deeper and deeper each time.

Princess Bubblegum: Just having Marceline slide her dick against her areola felt good to Bonnie, who would be content with just that and perhaps giving her a boobjob, but soon that pleasure would multiply tenfold as her nipple got pressed against. PB yelled loudly as it was forced to distend immensely, her pink flesh having no choice but to stretch to the cock as it brutally thrust in. Even with it having grown from the blowjob it wasn't anywhere near large enough to take all of Marceline's length but that didn't seem to deter the vampire queen at all. "Aaaah!~ Yes, fuck me Marcy!" she yelled, kneading the flesh of her penetrated boob.

Marceline: "That's the plan." Marcy laughed, her thrusts causing PB's boobs (or at least the one that wasn't being penetrated) to jiggle. Her heavy, cum-filled balls slapped against the tit, each thrust stretching out the pink flesh of Bonnie's mammary. "Y'know, if this only inflates the one, that means I get to fuck both your titties!"

Princess Bubblegum: PB's penetrated nipple had a snug grip around the shaft of the cock as it pushed it, almost like it was made of rubber and made to fit that one log of fuckmeat. She had already started to gasp and beg for Marceline to go faster, which the vampire queen had obviously no objections to. "I-I have no idea what'll happen." she stuttered out, genuinely curious herself, and while her scientific side likely wanted to write down how her body would react to getting filled by such a massive load her adventurous side only had one thing on its mind. Getting fucked senseless no matter the cost.

Marceline: Marceline laughed out loud as she kept thrusting into PB's boob, moaning at how wonderful the nipple felt around her cock, which pulsed and throbbed excitedly as she kept fucking Bonnie's tit. "We're gonna find out soon enough." she cackled, thrusting harder and harder into the princess' breast. Her balls churned and sloshed with countless gallons of semen, just waiting to be unleashed.

Princess Bubblegum: With the forcefulness behind Marcy's thrusts Bubblegum found herself bouncing back and forth on her ass, her cheeks making loud clapping noises in rhythm to the harsh pounding her nipple was enduring. A few banana guards had heard the sounds but thankfully they simply thought someone was playing with firecrackers while wrestling upstairs. Not the brightest lot. Since her lover was handling the fucking situation with gusto PB sought to relieve herself in other ways, a hand dipping down under her enormous cleavage to play with her nethers, something she barely even needed with how well Marceline was thrusting into her tit. She forsook speaking in preference of moaning like the whore she had become, panting with her mouth open as she neared her peak once again this night. A face of ahegao, if you will.

Marceline: At last, with a forceful grunt, Marceline gave one final thrust, suddenly stopping her movements as her balls emptied into PB's tit, gallon after gallon after gallon gushing into the mammary. The princess' boob began to inflate like a water balloon, doubling, then tripling, and finally quadrupling in size, and still growing! As it continued to swell, the tit's growth began to slow. The other breast began to inflate as well, albeit at a slightly slower rate. It seemed that the cum inside the penetrated boob was evening out between the breasts. Still, spunk flooded into PB's tits, now effectively too big for any standard bra, though still nowhere near as fat as her booty.

Princess Bubblegum: When the dick inside her tit erupted with a shower of hot, steamy cum Bubblegum let out a quick shout, her legs trembling from pleasure as she felt her body being flooded again. Just like before she somehow managed to absorb the forceful cumblasts, though one could easily see the jets distend her skin as they shot out of Marcy's behemoth. Unsurprisingly her tits were swelling massively, expanding outwards and taking more of Marceline's cock as a result. Even her nipples were growing, the pink teats matching her bloated breasts in growth! "Yeeaaeeesss!!!~" she yelled, her saliva-dripping tongue hanging from her mouth. And her orbs only kept on growing! Fueled on by the vampire queen's spunk, starting to look proportionate (or perhaps unproportionate) to the rest of her obscene body.

Marceline: As PB's boob took more and more of her dick, Marceline continued to cum into it, whimpering and mumbling with pleasure as she rode out her own orgasmic high. The blissful sight of Bonnie, paired with her ecstatic cries only made the climax feel that much better. Once her balls had finished churning out that particular batch of baby batter, Marcy slowly pulled her cock out of PB's teat, smacking her lips in satisfaction. Her member was still letting out fat droplets of spunk, which spattered on the floor as the fat shaft hung out in front of the vampire queen.
"You're just a great fuck anywhere, aren't you…” Marceline chuckled, floating up and squashing herself between Bonnie's tits so she could get a kiss.

Princess Bubblegum: Marcy's cock wasn't the only thing dripping as she pulled out, Bubblegum's nipple gaping for a few seconds before slowly closing back up again. The candy kingdom princess had changed so much compared to the prim woman everyone was used to. With her bloated, round orbs of ass and tits she almost reached the ceiling! Drool was running down her cheek while she recovered from her orgasm; if anyone saw her like this it'd be a scandal! 

Yet still she managed to titter and smooch her girlfriend, replying "Anything for you, Marcy. Do you think I should tell the guards that I am sick for the week and you and I could have some more fun?" She giddily bounced on her behind, reaching up to stroke the vampire's neck lovingly. "It should give us more than enough time to create the antidote." Her voice trailed off as she glanced down at Marceline's endowment, gnawing her pink lip softly, before looking over to the lab section of her room. "... But I think I should be able to brew up some 'poison' as well before that.~ I think it's only fair you get the proper equipment to try out my new improved body after all!"