>A foreign shaking motion rouses you from hibernation prematurely
>>4re y0u Alr1ght?
>A different Haydee is looking down at you, head cocked at an angle
>Looking over your shoulder, the bulbous mass that is the Haydee you woke up for the first time with is still there, resting atop the tile floor
>You look up at this new Haydee, now name Dee for reference's sake and shake your head in the affirmative
>>G00d, I w4s w0oried you w3re d3d due to 4 r0gu3 bot
>It's been a while since you've seen Haydee this THIN, her tits are almost smaller than her head, miraculously, with a rump that could actually fit through a door!
>It stirs in your servos something fierce
>So you ask if she is low on fuel
>She answers in the affirmative
>Standing up, you move behind Dee, she turns about, following you with her tracking sensor
>And you push her down onto her rump against Haydee
>You climb atop her and state "Pr3p4re f0r Refu3ling" in your most commanding voice, which makes her giggle as her oral port opens up for receipt of fuel
>her speakers emit a pretty shocked gasp when your fuel rod is unsheathed from your armor
>>Th1s w1ll b3 t0ugh...
>Her voice trails off, mesmerized by your engorged fuel cells, already primed for delivery
>And without another word, you grab hold of Dee's head with both hands and ram your Rod down her throat
>The sensation as her siphon pump kicks in, helping you pull out and slam back in repeatedly, pulling it deeper and deeper still is like any you have ever felt
>Each thrust draws you closer to delivery, a feeling of guilt mixed with excessive pleasure fills you at denying Haydee this fuel, justified with the ideal that you can always make more
>Until finally, legs pressed quite a bit into her bust, you release the payload
>And keep releasing it
>You fuel cells seem to be stuck in a permanent state of over-production, which while not necessarily bad, is concerning

>Your entire body is left there, rocking against her head by wave after wave of pleasure, still standing upon her plush thighs when her main fuel storage embiggens enough and causes you to sit upon it, legs dangling out to the sides
>You stay latched to her head as her Auxiliaries kick in, knocking you further up into almost a resting position, her head turned heavily upward to keep the rod in place as you continue to empty your fuel cells
>Tertiary and Quaternary kick in and just push you two up off the ground as your cells finally run dry
>Your rod slowly retracts into its compartment, Dee's pump unwilling to let it go until it is gone
>>T-th4nk y0u, 1 am g00d now
>Dismounting, you realize the enormity of the situation now
>You are now stuck with TWO fuel-hungry fatasses
>>Sh4ll w3 m0ve 0n?
>Dee says, entering a standing position, getting used to her new weight, seemingly oblivious that the Haydee behind her is still very much a functional unit, not destroyed by a rogue AI

>As she meanders towards the doorway to the next room, you halt her movement with a hand, grasping her right wrist firmly
>"H4yd33 n0t d3d"
>Dee looks upon you, then at the blob known as Haydee, then back at you before simply saying
>>0h
>With nothing else to do, you wrap yourself up in Dee's arms and both go into Hibernation against Haydee's rotund mass
>Darkness envelops your senses
>It feels like far too short a time before you are awoken once more
>It would seem Haydee is awake
>And she is not happy
>her body has reduced to a far more manageable size, still roughly three times the sheer volume of Dee, who has not deflated one ounce, miraculously
>>Wh0 th3 h3ll-3ll is this?
>At this point, Dee is awake as well and you introduce her to Haydee as "D33"
>Dee doesn't seem quite pleased about it, being relegated to a different name from her factory base, but says nothing
>The next, roughly two hours, are spent pretending to listen to Haydee as she yells at the both of you for not only fraternizing with another Haydee unit, but also giving up precious Fuel for her!
>The click on your HUD gently ticks up, counting how long she rants down to the nanosecond
>And when she finally finishes, you reply "1 h3lp H4yd33, b0th of y0u 4re H4yde3, I h3lp b0th"
>And thus, the two Haydee units, quite miffed, decide to put up with one another and see where the chambers lead them
>Haydee clocks in with a modest tum, as befitting a Haydee unit, a bust that is approximately six times that of her head, per breast, and a rump approximately 15% more massive than her bust topping legs swollen to match what they carry
>Dee has a bust approximately twice the size of her head, per breast, a modest tum, and a rump of nearly three heads per cheek, seems she has a more bottom-heavy weight distribution than Haydee
>That said, at her new girth, haydee is much easier to manage through doorways, but neither at their extreme is now able to fit in a vent

>The next few rooms are easily managed, especially with two combat-equipped Haydee units, almost as if these next few rooms were designed for multiple combat users
>Neither Haydee asks for a refueling, nor accepts when you offer, seems a sibling rivalry of sorts is keeping them preoccupied when not murdering AI
>And then it happens, the golden opportunity
>Your trio comes to a room similar to the early stages
>On one side is you three
>On the other is a new upgrade
>In the middle is a chasm too wide to leap across filled with Assassins, all looking up and brandishing their blades
>But thankfully, a duct makes it exceptionally easy to get across for you
>The upgrade is something you knew would be here, but unsure as to how you knew
>It is a second fuel device, complete with two fuel cells and a hose rod for refueling purposes
>It attaches easily to your chassis, around the first
>Equipped with two Hoses and fire in your motor, you order both of the Haydee units onto the floor
>They look at you quizzically, but obey, unsure of your intentions
>However, when a rod plants itself firmly in each of their respective rump fueling stations, they share a look of shock before going into the rhythm, unable to take your full length as their asses collide half-way down the shafts
>You do not even need to act, they do it of their own accord, eventually shifting pace slightly to allow one to be at the end when one hits your crotch, almost knocking you back with the force
>You can feel it burning in your fuel cells, they needed this after so many cycles unused
>Until finally, with a shuddering gasp from your speakers, you grab hold of their asscheeks and push them as far down each shaft as they will go
>Miraculously, with your help, you manage to press to the hilt into both of their asses, a massive pile of synthflesh now obscuring your vision as you bury your face in it, deadening your speakers as a powerful moan escapes

>It's too much
>It's too much
>You didn't expect it, but your system is overloaded due to all this refueling
>A titanic flood of fuel comes rushing from both sets of cells as you let out a long, blissful scream of joy into their artificial ass fat
>And they are both full within moments as it continues to gush forth, flooding their Primary and Secondary within less than 10 seconds
>Tertiary and Quaternary are flooding in moments, inflating before hitting the crit point that causes both of their bodies to just start taking in as much as they can as their bodies continue to bloat
>You waste no time, slowly returning to your senses now at approximately half-empty, each Haydee now rises higher than you are tall upon their Guts + arses alone
>With every inch of your body, you press against them, slowly pushing forward
>You are immediately met with heavy resistance, but slowly and surely, you press them towards the pit
>They begin freaking out, throwing out all manner of words lost behind titanic walls of synthflesh, trying to grab onto anything, but unable between their engorged breasts, guts, and booties
>They continue to rise thanks to still more fuel pouring forth into them, but you are nearing the edge, when finally, you collapse against them both
>unable to continue, you slowly recharge your inner battery, when suddenly, they tip over
>You smile inside as the duo, bloated beyond compare, fall head-first into the pit, crushing an entire horde of Assassins beneath their girth
>You fall forward atop them, fuel rods retracting into their now somewhat cramped internal storage atop an exceptionally plush original Haydee, Dee stuck somewhere off tot he right beneath the somewhat more engorged Haydee

>Since the pit incident a few days ago, you have taken to relieving yourself is an exceptionally deep pit a few rooms back every (approximate) solar cycle to re-calibrate your fuel cells
>It's been slow, but with each passing day, your payloads become less and less extreme as the pit slowly fills to the brim with spent fuel, like a lake that any Haydee unit would kill for
>Each day, you awake atop one of your two companions, a little bit more deflated as their bodies return to a state of "normalcy"
>Then go back to your pit and unload, no Haydee stimulating your system brings composure and balance despite your double-rodded machinery
>Then return to sleep mode atop a Haydee until the next cycle starts
>It's been a few weeks now and the Haydees have finally started to get to a more manageable size, not light enough to get out of the pit, but Dee can waddle around and Haydee can sit up
>The pit you keep unloading into appears to be nearing its limit, the fuel level has risen almost to the ground you blow off from and the door leading further back to a few more pits is locked for some auspicious reason
>So you decide to move on ahead with the next solar cycle and see what awaits your party
>However, upon stepping through to the next chamber, an exceptionally audible "click" echoes from behind you, signalling the door locking
>Shit, shit, shit, shit
>Turning slowly around, you find an Assassin bot looking down at you from a ledge with a guard rail all the way across
>They are looking over the railing, right at you, when a girly voice emanates from its speaker 
>>You look cute, got any fuel for me?
>Did the Assassin just ask you for fuel?
>Yes, yes it did

>Against your better judgement, you decide to service the killer robot with two giant death blades
>Crawling into the left vent, you make your way up and peak out to find her just sitting there, legs crossed, waiting for you, head crooked to the left somewhat
>>Well? I'm waiting
>Apprehension grips you, but you step forth into the open space
>"P-prep4r3 f0r r-r-3fu3l1ng-g"
>>Oh for Cripe's sake!
>You are pushed to the ground as the Assassin pins you in place with her blades, rods now exposed to the open air
>>Perfect!
>And suddenly, this AI who speaks impeccably well is ramming BOTH of your Rods into a hole in her crotch, one you did not know Assassins had
>And she works it quite thoroughly, leg pistons moving her modest posterior up and down without impacting her torso at all as her two "eyes" stare down at you
>This goes on for some time, the pressure in your fuel cells building up to a crescendo until finally she releases her blades and slams her entire bulk down upon your rods, taking it all in and distending among the wires in her torso
>And indeed, your bulkhead fires off with a resounding spurt into her, soaking into her servos, different from that of a Haydee unit
>She just sits atop you, waiting for it to end before saying
>>Thanks, sweetheart, you're free to go now~
>And she separates from you before meandering off into the next room
>Nowhere else to go, you decide to follow
>The next room is a plain 20X20X20 foot cube with the only notable thing being a deceased Haydee in the corner and a familiar upgrade on a small cube in the middle
>The Assassin is resting with her head between her elbows, blades pointing up and out as she rests her head just above the upgrade
>>So, tell me, do you prefer a Haydee unit's ports or mine?

>You shrug and say "4ny p0rt is g00d 4 m3"
>>I see, well, I am not so easily pleased, take this upgrade while I make some arrangements
>You take the third Rod upgrade from the table and attach it to your crotch with the other two, this will be quite tight inside of you
>It settles into place, 6 fuel cells congregating underneath a triangle of fuel rods
>While doing this, the Assassin meandered over to the Haydee slumped against the wall...
>And chopped off its head
>And chopped off her own
>To say you are shocked is quite true, what was she trying to do?
>And then you see it, her head is moving about on its own on a set of miniature pincer legs, her old body slumped over as she goes up to the Haydee's neck slot
>And just hops in
>>Much better~
>She says, as the body comes to life
>>However, this thing hasn't had fuel in a loong time, care to help me?
>You just stare, aghast, three rods standing at attention, somehow ready to fuel up after only two-something odd minutes
>She wastes no time in her new body, pushing you to the ground and forcing not one, not two, but THREE rods into her primary fueling port!
>And she is enjoying her self, probably a bit too much, considering her mental system has no pleasure dampening system
>Just a continual cacophony of moans from her speakers
>Again and again, her bulk rises up almost to a standing position before slamming back down and devouring your shafts in their entirety
>>Give it to me!
>And you do, a deep, guttural energy flows forth and just pours into this Assassin-Dee
>Her primary tank is full up in a few moments, but what is odd is that is barely distends at all
>Her Secondary tanks upon her chest begin filling out, but only rise to approximately a head and a half each before halting
>And then her Tertiary and Quaternary activate and just balloon outward, pouring forth like no tomorrow
>A minute and a half passed as your cells empty out into her

>The result is something else
>It's a Haydee unit with more ass than the rest of her entire frame, easily encompassing a normal Haydee each, but with the head of an Assassin
>>My, that was... 0oh, I haven't felt something like that in at least a few million cycl3s
>>Y-you can c4ll me Ass, since it seems that's all I am~
>Well, you made a new ally
>A scary one, but an ally nonetheless as she dismounts from your worn crotch and tests her new body, which ripples with every step
>Holy shit man, that ass is to fucking die for, it rises as high as her neck standing up and doesn't even sag, synth-flesh is a glorious thing
>>Shall w3 go find your companions?
>Rising, you do join her in the trek back to the Pit, she dismantled her old body and collected the parts, makes you curious what she plans, but you say nothing
>Oddly, despite this titanic bulk, she seems unfazed by it, making exceptionally spry movements, even jumping over the guard rail in the previous room!
>Of course, you have to help heave her titanic tush through the doorways, but it's nowhere as bad as Haydee back when she was fuel bingeing
>The Haydees in the pit are DEFINITELY not happy to see yet another Haydee unit
>They are even more displeased to see an Assassin piloting it
>This is gonna be another long argument...