A Futa Werewolf Fanfic of this GIF: http://orig15.deviantart.net/66a9/f/2012/318/d/5/sabrina_finale_by_xheihachi-d5l1jur.gif

Alex's girlfriend, Sabrina, got down on her hands and knees and began to strain. She was fully nude, basking in the moonlight that streamed through their sliding glass doors, and his camera was already rolling.

She was generally turned on by these sessions, loving the idea of becoming a werewolf--of becoming Alex's werewolf. She would writhe and grimace and grunt and stick her ass up in the air, shaking her tender little titties as they hung below her, and she'd clench her teeth and close her eyes and push. She'd act as if she could feel a tail, and she'd push it out, bushy and long. She'd act as if her face was rushing forward, a muzzle erupting in pain and pleasure. She'd act and act, hunching her back and straining as if fur would just burst out of her, covering her shoulders and back and round sexy ass.

She'd act like the transformation was coming true, and by the time she was "completely" changed, her unshaved pussy would be literally dripping lube down her thighs. Alex would shut off the camera, unzip his pants, and fuck the shit out of her hot, wet cunt, while she grunted and growled and pretended to howl with every orgasm that rocked through her skinny little body, through her perky little tits and in her big round ass.

Eventually, he'd cum inside, unleashing a hot load deep in her pussy, and she would slide off his softening dick, satisfied with another session of roleplaying their shared fantasy. Alex had introduced her to the idea. She'd turned lycanthropy into her own filthy desire.

Sabrina didn't tell Alex, but she wasn't really playing anymore. She truly wanted to transform. She wanted to become a furry, horny werewolf. If it was possible, she wanted to grow a tail. If it was possible, she wanted to grow a muzzle. If it was possible, she wanted to cum with real howls baying in her lupine throat.

It wasn't about satisfying him anymore. She wanted to really go wild and unleash a sexier, more aggressive self. She wanted to be more monstrous, more aroused. She needed it.

So she bathed in the moonlight and she wished it were real and she strained. God, how hard she strained. Her little clit was thundering with her heartbeat, a button of steel underneath its hood. If she could just change, she knew she would never go back. She loved Alex, but her sexuality was changing. It wasn't enough to just pretend to be a werewolf.

She wanted to become a real monster and have monstrous sex!

She strained harder than ever before. She clenched her fists, writhing, screaming between her teeth, pushing her ass up high. She hoped this time around, the film would look fucking erotic. She hoped this time, it'd be easy to watch the vid together and relive the fantasy.

"Are you okay, babe?" Alex asked, a little worried by the sounds coming out of her throat.

Sabrina didn't answer. Her skin was burning up, turning bright red all over. Her imagination felt so potent. It was almost as if she could feel the nascent tail, awaiting it's eruption. It was almost as if her face was thrusting forward, forming a maw full of scything fangs.

"Sabrina?" Alex asked, now genuinely worried.

She was straining until there was real pressure behind her face. There was real pressure in her hands and feet. There was real pressure in her pussy, so aroused, so fucking on edge that she knew she would squirt five feet if Alex touched her clit. There was real pressure in her big fat aroused butt, and she no longer felt any embarrassment or fear. She just wanted to let the pressure out. She wanted out! The real Sabrina needed out!

"Babe," Alex said, "babe, it's just an act."

Sabrina began shuddering all over. Her asshole was throbbing, the sphincter feeling intensely pressured from within. Her tail, her tail! Hnngh! She quaked and groaned.

"Babe!"

She grimaced, baring her teeth, and it felt as if her fangs were just moments away from scything out of her gums, her nose and face moments from thrusting forth into a werewolf's muzzle!

"Sabrina, stop!" Alex shouted, now clearly upset. "You're not a werewolf, babe, just stop!"

She didn't even understand him, but she didn't have to. He was wrong. There was more lust coursing through her veins than her little blushing body could handle. She would cum apart.

Sabrina almost exploded.

The newborn werewolf within her tore out of her body in almost four ways at once.

The pressure behind her aching butthole doubled and redoubled in less than a second, and her ass cummed when the werewolf's tail brutally ripped its way out of her taut butt, bursting from her aching sphincter and sliming between her shuddering muscular buttocks. With every pulse of assgasm, she strained involuntarily, bending over further, forcing more of the wolf's stiff tail out of her anus, a feedback loop of anal pleasure that only increased with the length and breadth of the tail. Her butthole screamed with pleasure. Her pussy cummed, squirting girly jizz on the floor.

Her lips pushed open and out, wider and further, her entire face tenting brutally with loud bony cracks, a mouth full of fangs visible in the fraction of a moment before her thick lips snapped at the corners like rubber bands, and her cheeks tore open with loud, meaty rips, baring more and more sharp teeth. Inhuman moans rose from her changing throat, rising towards a song of orgasm--then with a wet burst and violent rip, her tented human face finally tore down the middle, splitting Sabrina the human in half, and a howling shewolf's muzzle forced its way through her shredded nose, mouth and chin. Her fluttering eyes rolled back, the joy of cumming to pieces giving her immense relief, and then she closed them and thrust from her neck. With a long, wet slurp, the newborn werewolf felt her delicate human face split apart completely, peeling away while her inner beast shoved her new lupine head out of her humanity.

Sabrina's small, delicate titties immediately grew immensely, painfully erect. Her pink nipples thrust out into hard, thick cones, and her breasts immediately puffed up, growing furiously taut. Then, with the same rapid violence, her huge werewolf nipples penetrated her tender human nipples from within, thrusting out of the peak of each tit, jutting and furiously cumming their victory birth. Milk jetted from the inner beast's swelling, fertile tits.

Sabrina arched her back, shaking her howling, newborn shewolf's head while she butt birthed more tail and grew much bigger, milkier breasts. Her breasts expanded with a pulse of orgasmic energy, forcing the middle of each tit to dilate and be spread with aching, orgasmic joy around the beast's thumb-sized nipples. They grew fuller, fatter, wider--the skin of her human breasts thinned until it was pale white and aching to burst.

Then, with immense pleasure, she felt her human nipples rip--big jagged tears shooting through her areola and out into her breasts. With wet flops of horny flesh, humongous furry shewolf breasts puffed through the gaps, readying her human breasts for their violent end--and then her shewolf chest blew her human breasts to pieces. Cumming skin flapped back almost to her flanks, and two gargantuan shewolf breasts exploded out of her puffed chest, flopping in heavy waves beneath her and cumming milk from humongous black nippes, each monster breast outmassing her lupine head and filled with hot sexual milk.

And last and most significant, Sabrina felt a volcanic orgasm exploding out of her pussy, the sheer force of energy unleashing the shewolf's true monstrous genitals--the last time her cunt would ever cum! Directly in front of her boyfriend, with her snatch aimed right at him, she felt the shewolf's throbbing meat surge out of her groin and fill up her pussy. Her vulva swelled with orgasm, her labia spreading open as they bulged, displaying her teeny-tiny human vagina as it began violently ripping open at the top and bottom. She howled with pussygasm, feeling her growing meat her tearing pussy apart. Behind it, her wet furry sack descended, heavy and full, and within a second, the shewolf within was crowning Sabrina's shredding snatch.

"Sabrina?" Alex shouted.

Sabrina howled a third time, answering her boyfriend's cry by squeezing her ass to birth more tail and squeezing her groin to birth an aching, giant monster cock and two massive, furry balls.

Film me, Alex! I'm butt birthing a tail! I'm giving birth to a thick dick and huge nuts!

Look at me! It's everything we've ever wanted, finally free! Goodbye butthole! Goodbye pussy! Goodbye humanity! I'm cumming!

Just inside her bulging pussy lips, her girthy penis was curled over her hefty sack. She howled and squeezed violently, explosively sundering her pussy with sheer pressure. The tear shot down to her taint first, smooth human labia brutally cumming apart, and her fat girlcock tore free, cockhead ripping loudly through her taint, her thick red shaft flopping below her in a half-erect pillar of suckable shewolf dong. Her labia peeled apart with a meaty rrrrrrip, and her big furry balls burst out of her torn cunt and spilled between her thighs, flopping and wet with pussy lube.
 
Cumming pussy lips spread apart at her thighs, tattered and crumpled, and with almost no taint left to contain the wolf, her butthole cummed too, ripping apart her human asshole to free her tail in an anal apocalypse. In an instant, her petite little human rear had been torn to shreds by the beast. Alex shouted something, horrified, but Sabrina was only enthralled.

Look at me, Alex! Ass! Cock! Balls! Awooooo!

She grabbed those tattered pussy lips, folding them over fingers that were peeling open to reveal claws, and she yanked them apart. Her buttgasm and pussygasm surged up through her massive weiner, straightening and swelling to full erection with intense force. Her big balls jiggled beautifully in her thigh gap. Her penis slapped into her belly. Her flared cockhead just pushed between her hot, shaking monster tits. She yanked the ruins of her pussy until everything tore!

The rest of her vulva split with a loud rip, and she felt it cum apart from vagina to clitoris in twain. The last shock of her pussygasm arced up her thick, full erection from the massive base of her shewolf penis to the swollen, flared head jutting lewdly out of her foreskin--well over a foot of wrist-thick shewolf boner. Her clitoris cummed its annihilation, a celebration of the shewolf brutally destroying Sabrina's pussy, and a star of orgasm blasted through her newborn genitals.

Sabrina felt her new balls tighten, her prostate bursting, her aching cockhead erupting, and in full naked view of Alex, the howling black-furred werewolf that had been his girlfriend started jizzing ropes of white semen into her furry cleavage, across her huge breasts, and all over the carpet of their living room. Hot sticky ejaculate clumped on the fibers.

Sabrina's howl surged over and over, baying at the moon with triumphant orgasm. It felt so good to unleash the beast. She loved having a tail. She loved her cumming butt. She felt so relieved when that painful pussy burst open. This was her true self, cum at last, a big-breasted shewolf with a giant surprise cock and massive surprise balls. Yes, yes, yes!

And as her first orgasm ebbed, her hands expanded out of their skins, delicate girly fingers peeling open to reveal terrible black claws and massive hands. Her feet burst open like worn socks, the werewolf's feet expanding forwards out of the ruins of her dainty toes before splitting open her soles. The muscles of her arms and legs bulged with pulses of expanding flesh, and the skin of her tiny arms and fit legs split open to reveal wet fur before peeling back and sloughing off her lengthening limbs.

Sabrina's back hunched, her spine lengthening behind her shoulders. That vast, beautiful curve of skin leading to her massive buttocks began to swell--and then in a long, wet rip, her human back split open along her spine. She wriggled her back and shoulders, shaking off her human skin like a butterfly shedding a cocoon. The empty halves of Sabrina's torn human face flopped about her throat, still bearing her scalp and sheaves of her long blonde hair.

She shook her lupine head to unstick the skin off her neck and unclump the locks of raven black, shoulder length hair of her shewolf self. Then she reached up to her throat with her claws and simply pulled at that mess of skin. The tear on her back continued up through the crumpled scalp, and she pulled it away in a wet flop of shredding skin. The tear on her back caught up the split above her straightened tail, growing from the base of her spine.

It was with an immense satisfaction, like taking off stuffy clothes to become fully nude, that Sabrina's ruined human skin finally sloughed off the newborn werewolf. The tight, uncut belly of her human flesh draped briefly over her gigantic female erection, then slid off under its own weight. Her red cock bounced back into place, slapping wetly against the dark fur of her belly.

She could feel her new body, every steel-taut inch of it. Every strong, svelte muscle. All her new length and size, at least six feet of werewolf. Her lengthy muzzle and her graceful lupine jaw. Her black lips. Her canine nose, breathing in the heady stench of pussy, cock, milk and semen.

Aftershocks of orgasm still throbbed in her beautiful, sensitive form. Two massive breasts hung tautly beneath her chest. Stiff nipples poked at the cold air, each giant tit dribbling with the last spurts of hot milk. Still on all fours, she could feel her entire round ass throbbing with the last of her tail-born orgasm. Beneath those glowing, pleased buttocks, where her pussy lips once waited, she now felt her massive, sexy balls hanging in a big furry sack. Where her clit had stood, the base of her female cock erupted generously from her furry bush--a crimson baseball bat of veiny meat, tender foreskin, and tasty, hard penis. The flared head dribbled with a tiny bit of hot jizz, now running down the underside of her lightly cummy cock.

Satisfied with her escape, Sabrina's mind finally turn to her meek little boyfriend, the one who had planted this fantasy within her until sheer arousal tore her apart. It was her turn now. It was time for monstrous anal sex, bareback and raw. She would tackle him, strip him, and bend him over.

With her cock slicked in pussy lube, she would mount him, fill his butthole with dick, and cum up his ass. With her balls slapping on his rear, she would infect him, and soon, he too would become a werewolf. He would push a cum-slathered tail out of his asshole and rip away his skin.

The very idea turned Sabrina on so much, her erection ached with lust for boy butt. She turned to face Alex and the camera that had filmed the end of her humanity, and she aimed the massive consequence between her legs at her prey. He was frozen, still recording.

The newborn werewolf smiled and pounced at her prey.