Author's Note: Requested by Lilybunny. This contains Furry content.

*

Prim stood in the corner of the frat house, a half empty cup of punch in hand. It was spiked, each sip imparting a hot flush through her system. Other people were already drunk, dancing and laughing together. She's spotted several couples going upstairs and stay there. The floorboards creaked overhead. Her friends were among the dancers, their inhibitions relaxed after a few cups. She remained level-head, cautious of drinking too much alcohol.

She preferred to observe for the meantime. Guys approached her on occasion, attracted by her plentiful curves and glasses, hoping she might be the hot, virgin bookworm many mistook her for. Prim relished disappointing them. She had no sexual interest in human males. Not since her first time with an Anthro.

Some milled about in the party, a blatant minority. Twenty years ago, the phenomena known as 'TF', or Transformation, came to be. It struck at random and took anywhere from days to mere minutes. Many gained unbelievable figures. A fennec fox passed her by, their beach ball breasts bouncing within a much too tight shirt. Prim inhaled and savoured her scent. The fox was approaching her heat, when her pheromones would be most potent.

Prim sipped her punch, grimacing at the overpowering bitterness. She was on the lookout for an Anthro, hoping to meet a horse for once. Hearsay claimed they could put women into comas from nothing but orgasms. Her pussy demanded one such pounding, left with only her fantasies and fingers for days now.

It became apparent she wouldn't meet one by waiting, however. Prim threw caution to the wind and downed her cup, then refilled and repeated. Everything turned to a drunken haze of flirting -- with a pair of gorgeous cowgirls she believed -- until it all blurred to nothing. And now she paid for the lapse in judgement.

She had woken up an hour ago in her dorm room with a splitting headache and rays of death streaming in through her window. A miniature fort of pillows and bedsheets protected her. Her memories floated in discord with one another, out of order and blurry. She recalled chugging the rest of the punch bowl at some point. No wonder her stomach and head seemed ready to murder her.

Her roommate, Dana, was nowhere to be seen. Prim had no idea where she'd gone last night. Knowing Dana, it was probably upstairs with a couple of guys, though she couldn't recall whether Dana was drunk or not. That mystery could wait. She needed some water.

Prim stood with a groan. The simple motion turned to one of agony as her vision churned and her stomach lurched. She planted a hand on the wall and guided herself to the dorm kitchen, hopeful that most others would be in a similar predicament. As she'd hoped, it was empty. Prim sat and nursed from a heavy glass of water, rubbing her temples to try and ease the primal throbbing within her skull. Each beat of her heart resounded in her brain like a gong.

"Never again," Prim said, her first words that morning, and winced at her hoarse voice. She took a deep mouthful. Why she had drunk so much, she couldn't comprehend. Prim was a small girl at five-foot-two. Alcohol pummelled her system like a one-sided boxing match, as she'd discovered from during high school.

Minutes passed as she drank in blissful silence. The thumping of her heart died to a subtle patter and her belly settled into place, thankful for the cool liquid. Calmed, Prim returned to her room. Perhaps Dana had returned, though she doubted it. Dana preferred to extend her night's out long as possible, often entrapping some poor guy between her thighs. Not a bad place to be trapped.

Her headache had passed into a quite pumping in the background. The roiling of her stomach was gone, leaving a pleasant sense of complacency and warmth behind, the kind that spread out into every extremity and left her feeling lethargic. But also horny. The perfect combination, and excuses, to lay in bed and read something steamy.

Prim sighed as she laid down and opened her book. It was a typical fantasy story, prince and princess, evil wizards and a dragon or two, with one core difference. The novel was written by Leia Pierce, a renowned author, and Anthro. She had transformed into a randy fox three years ago, now her novels were enriched with her new culture and libido. Prim adored the shift toward eroticism.

"Hmm," she rolled her hips as the book moved toward another sex scene. Her hangover dissipated into memory as her hand slid into her sweat shorts, where she encountered her eager pussy, already moist. When did she get so wet? Prim wondered as she stroked her labia, teasing her clit into the open. The scene progressed to penetration, at did she. A high-pitched gasp rang out.

Prim pumped her hand in tandem with her imagination. Her mind conjured herself, prone before a huge Anthro bull, his rigid cock big as her leg. A wolf girl had her face trapped against her pussy, forcing her to lick at the slobbery folds, while her own snatch burned in need. It was hotter than ever, as if a flame was alight inside her. Prim's moans turned to pants as the heat built higher until it wrenched her from the fantasy.

She dog-eared the book and set it down to yank her shorts off. They were soaked, with strings of her juices hanging off them and between her legs. Prim spread her legs wide and hunched over, pressing her full, DD breasts into her stomach. Pleasure shot from her nipples as they rubbed against her shirt. She ignored the sensation and studied her privates.

Her plump snatch throbbed and streamed with cum. A slight breeze came from her window and brushed against her puffy folds, sparking an explosion of pleasure. They engorged further at the sensation, while the hood of her clit seemed to recede, pushing its ward into the open. The button twitched and expanded, growing to the size of a pea, then a marble.

Prim's arms itched and drew her attention. Slight hairs sprouted across her smooth skin, they thickened and took on a blue hue as she watched, while others rose to life. Was she transforming? Impossible, there were always warning signs. A fever, dehydration, headaches. All things she'd experienced in little over an hour. A rapid transformation, she thought in awe and laid down.

All manner of changes could occur when transforming. Some grew taller to better suit their new form, others buffed up, and a few even gained monumental curves. More so, many claimed the process led to the most powerful climaxes of their lives. Prim grinned to herself as she returned her hands to her pussy.

It was a furnace, somehow hotter than a moment ago, and rising. Her clit continued to swell, reaching over three inches from its home, and poked into her palm. She shrugged and grabbed it. Prim arched her back at the supernova of bliss. Her juices sprayed forth across the room, crashing against the wall by the door. Another blast struck, and another. She pounded her fingers deep into her tight snatch as she stroked her ever-growing clit.

"More, come on, give me more," Prim moaned and rocked her hips, urging her digits deeper. They poked against her cervix, tickling the tiny entrance to her womb. Her ass squelched against the drenched bedsheets as a second orgasm grounded her. Every muscle spasmed and her head fell back. The region around her lips had turned waxy, malleable for her new body to take shape.

"Yes, yes, yes!" Prim wailed. Her clit stood several inches taller now, erect as any cock and thicker to boot. At its base, a bulge had formed, one that ballooned faster than the rest. As it rose, her pussy tightened, forcing finger after finger from its depths. She stroked her lips instead, too lost in her ecstasy to consider what it meant.

Her face elongated as her eyes rolled. All sound vanished then returned in greater clarity. Her skin was no longer visible, concealed beneath a gorgeous layer of cobalt. It was thinner on her breasts, which were soon inundated in their own blaze. Prim worked both her hands, now paws, on her extending clit. She forced her eyes to focus on it. A flat, mushroom-shaped peak formed.

She was growing a cock! Prim pulled it down to her and opened wide. The head reached into her maw and stuffed it full. It palpitated against her cheeks and stretched further, pushing on her uvula, yet she remained stalwart. Deeper and deeper it went, until her throat lost definition against its sheer enormity. A sense of fullness at her crotch distracted, but she couldn't move, impaled as she was.

Instead, she inspected the area with her new paws. Where her pussy once drooled and demanded to be filled, she found a burgeoning pouch, loose and wrinkled, covered in thick, coarse fur, within which two expanding ovals pressed against the soft pads of her fingers. Prim moaned around her cock and arched her hips to drive it further.

Her once light skin turned black along her dick. Pink splotches spread at random intervals, leathery flesh formed below the middle of her length, thickening and dampening its sensitivity. Her knot persisted in growth, on par with a grapefruit, conspicuous even against her massive girth. Veins throbbed to life, thick and powerful, and overrode the pulse in her throat. She massaged her balls, moaning her encouragement for them to grow.

The invasive inferno spread to her feminine aspects. It filled her breasts and pressed against her nipples, as if demanding an exit. Without one, her chest burned as it joined the incredible changes befalling her. Prim abandoned her balls, now on par with apples, and massaged her boiling mounds. They swallowed her fingers and sent bursts of electric pleasure between her nerve-endings. She suckled on her cock and groaned deep in her chest.

Almost done, she thought as her member slowed in its growth. The bed sank under the weight of her balls and her ass lifted her higher. Prim pressed her expanding tits around her cock, engulfing its rigid form in their plushness. Greater she swelled and higher her pleasure soared. Her legs bent at what was once an awkward angle to pleasure her balls, churning the unspent cum. Pre-cum gushed directly into her stomach, such was the length of her prick.

The burn faded from her crotch and head, and focused on her hips and ass. Prim fucked her tits and throat as she urged her transformation to continue, hopeful that she would gain more oddities to her form. It was rare, but a TF could result in unique qualities. A woman had turned into a mouse with an udder and two pairs of breasts, along with an impressive dog cock. Prim prayed she might have more.

Her stomach rumbled and echoed in her testes. They quivered against her elongated feet and reverbed in her legs. The fat on her thighs jiggled, stopped, and hardened into muscle as her body accomplished its final touches. Prim hugged her tits and cock tight, whimpering in bliss. A bit more. A bit more. Her eyes blared wide and rolled in their sockets. Her knot dug into her belly as it swelled and heated. It sloshed as her cum piled inside before rocketing onward.

Prim screamed around herself. Semen roared into her stomach, filling and overwhelming the organ in moments. Her gut ballooned with cum. The pressure forced it up her oesophagus, coating it in her viscous jizz, before overflowing her mouth and nostrils. She moaned and swallowed as best she could, hungry for more even as her abdomen outstripped a full-term pregnancy. Her breath ran short, then dried out. Darkness fringed on her vision.

Her back jerked and arched, yanking her head free of her cock. It spasmed in the open air, doused in cum and spit, and unleashed a final wave. Prim gasped for air and stroked her massive cock, milking the last of her climax. A final glob of jizz oozed free and rolled down her length, thicker than a slushy. She grinned to herself and stood on her new paws.

"Amazing," Prim said and sauntered to Dana's side of the room, where they shared a full-length mirror, "Oh, yeah," she licked her muzzle and ran hands down her sides. She wasn't any taller, but her curves more than compensated for it. Her focus moved to her head, intent on taking in her new form with lavish attention.

A pair of droopy, folded ears hung from atop her head. They flipped open at a thought, revealing the pink of her ears and allowing her to hear better. She giggled as she toyed with their positions. Of course, her face now curved into an elegant muzzle with a pink, twitchy nose and whiskers. She had buck teeth, but the usual set remained. Prim hadn't imagined herself as a rabbit beforehand, though she couldn't deny how cute she appeared.

She grimaced at a sudden burn in her scalp. Her original head of hair receded to the back and lengthened, then rose into a chestnut brown ponytail. Fitting, she thought with a glance to her now flaccid cock. Prim returned her attention to her upper body and beamed at her reflection. Curvy had suited her before, when she had a pair of measly DD cup breasts, now she defined the word.

"Hmm, you like it too?" Prim asked her prick. It throbbed within the sheath, which sat atop a pair of massive balls. Hopping would be a disaster, not that she had any intention of conforming to her new species stereotype. Why would she hop when her hips were crafted for swaying into a room? Any female would stare in lustful envy, both craving to worship and berate Prim's oversaturated behind, before finding themselves faced with a slab of horse meat.

Even flaccid, her cock was half the girth of her supreme thighs and hung past her knees. It was propped against her turgid balls, which sat against her shins. She took a few experimental steps and found her body naturally worked around them, walking in a way that, rather than make them a hindrance, used their egregious size to her advantage. They were akin to a second pair of hips.

She would land a mate in no time with this figure. If it wasn't her new form, she would've leapt at such an Anthro and never let them go. Prim groped rubbed at the side of her tits, unable to reach the front, and imagined her human-self being impaled on her mammoth cock. It'd stretch her cunt so tight and push it further, until the knot slid inside. At which point she would have been ruined for anyone else. A double-fisting would only begin to simulate the fullness she'd experience.

Now she wanted to fuck someone. Prim turned to her side and giggled at how her ass and tits stuck out from her lithe frame, the former resembled a shelf on its own, or a chair. It squished against her hand, natural as ever, yet remained buoyant and firm in its shape. Someone small could sit atop it, a possibility she vowed to test someday. Her breasts followed the same principle, soft to the touch while firm in shape. And her nipples were amazing. Pink and huge and squishy.

All fell flat to her cock. It rose from its slumber, peaking out from her sheath as it extended into the air, as huge as before. She couldn't reach the top without bending it. Who could resist her like this? Nobody. Her nose twitched at the indominable array of pheromones pumping from her cock. Anyone, human or Anthro, would succumb if they got a face full of the chemical musk.

"Hey, Prim! Man, last night was great," Dana greeted as she stepped inside. She had her face turned away from the mirror, busy setting things down while she recounted her exploits, "I thought I was done after three, then they went and brought this Anthro in. Oh man, he was a fucking stud. Think he was a Doberman or something. My pussy hasn't been worked so... hard... oh god."

"Hi," Prim turned to fully face her roommate with a shy wave. Not with her hand, but her cock. It was both funny and functional, as the movement spread her musk around. The real fun would be in how Dana reacted.

"So, uh..." Dana summoned some spit to wet her mouth, "When did you start?"

"About ten minutes ago I think."

"Jesus," Dana muttered. She took an involuntary step forward. Prim smirked, an expression few would see as malicious on her new, adorable bunny face, and idly passed her dick between her hands, "Looks like you got a good one."

"Yeah, you wouldn't believe how good," Prim teased and pat her belly, still swollen from her earlier cum load. Dana came closer. Her eyes lacked focus, pupils dilated, and her nostrils were flared. She forgot to gulp and a line of drool ran down her chin.

So powerful, Prim thought as she observed her roommate. Dana had purported a high resilience to Anthro pheromones, yet here she was, drooling after less than a minute in Prim's presence. So easy, the newly changed rabbit giggled. She didn't need to waste any more time. Several feet of floor space stood between them, a distance she could easily clear if her legs were strong as they seemed. Prim crouched and leapt off in a fluent motion.

Life sparked back to life in Dana's eyes as she was tackled to the floor, then receded as her face was covered in Prim's cock.

"What does it smell like?" Prim asked, curious about her friend's current brain functions.

"Like cum," Dana answered and inhaled deeply, "And dirt and sweat and... and need."

"That's not a smell," Prim chided and giggled, "But whatever. How about a taste?"

"Yes," Dana said, her voice barely a whisper yet confident in her desire. Prim moaned as a small, slick muscle ran across the underside of her dick, "It's so salty," Dana noted in a dreamlike voice, "But it's so good."

"Here," Prim propped herself up and angled her cock down into Dana's mouth. No one fully understood the properties in Anthro musk. They knew it contained a potent pheromone that grew stronger during certain periods, but it also contained chemicals they still couldn't identify. One such chemical was an elasticising agent.

The rabbit moaned as she relived the first time she experienced it, and as her cock past Dana's luscious lips. No sensation compared. It wasn't as powerful as orgasm, nor was it as weak as simple foreplay. The feeling was, simply put, a waypoint between pleasure and ecstasy. Having her belly bulge with an Anthro elephant's cock was something she could never forget, whether she wanted to or not.

And her cock was bigger than that.

"You lucky bitch," Prim snickered as she lowered herself. Her balls rested against Dana's chest, which bulged with the monumental prick sliding down her oesophagus. The human gagged and gurgled moans as her insides were stretched. Spittle bubbled from around her lips and poured into her hair. Tears welled in her eyes from the pressure on her uvula and her stomach lurched in protest, yet her thighs were spread and her fingers toyed with her cunt through her panties.

Prim replaced her friend's hands with her soft paws. She shoved the underwear aside and pressed her fingers into Dana's hole, matting her fur in the girl's juices. The supple pad on her palm crushed Dana's clit. Her moans vibrated throughout her body and reverbed through Prim's, eliciting a deep moan from the rabbit.

This was just the start. Prim thought as she sank the last of her sheath into her roommate's slavering maw. She squatted above her, sawing her cock to and fro. It penetrated Dana's stomach, then retracted to her oesophagus, and back again. Some specialists claimed that prolonged exposure to an Anthro's pheromones could have serious side effects, akin to those of a drug addiction. The only known cure was for the individual to transform.

But no one could control that. Not yet. They were trying and failing. Prim wanted them to. How could they even think of trying to regulate something so wonderful? The marvel and shock of transforming, the gradual freedom of her body changing into something new, something powerful and sexy was a life-shifting experience all its own. Choosing to transform would cheapen it.

More so when surprises like pouncing her roommate also awaited her. Having a choice meant others could predict it. Not here. Dana was completely unaware of what had happened, and now she was Prim's personal throat-pussy. At least for now. The girl wouldn't think of anything else until Prim gave her a reprieve from the mind-addling pheromones bombarding her senses. She could barely fathom how powerful they were with Dana's nose flush against her crotch.
"Hmm, fuck," Prim moaned. She was about to cum. The heavy fluid churned within her balls and overflowed into her knot, swelling it within Dana's mouth. Her stomach clenched tighter and tighter, like a car press, slowly pushing down on her self-control. A little more. Just give her a little longer to enjoy Dana's mouth.

Her thrusts turned jerky. She wrapped her hands and thighs around Dana's head, pounding into her with short, violent lunges. The human gagged harder. Saliva, tears and mucus clung to Prim's fur on all sides. Bridges formed and snapped with her thrusts.

"Cumming! Oh fuck, I'm cumming!" Prim announced. The pressure in her gut reached its apex and forced her orgasm out, crushing all resistance. She shoved Dana's head into her groin, inundating her senses with musk. In spite of her recent orgasm, Prim's seed swelled her knot and gushed forth. She curved her back to watch her roommate's belly, already pudgy with pre.

Her cum reached its zenith and gushed forth. She envisioned the journey of her seed. They heard the call of her orgasm and raced to her knot, filling it as they now did for Dana's stomach, before overflowing into her shaft. Released and eager, the swimmers crashed into her urethral walls, striking nerve-endings and urging more of their brethren to join. They could sense the moist cavern that awaited them. It triggered their basest instinct. They squirmed in longing before shouting in bliss as they were unleashed.

Prim rolled her hips with her climax, dragging her spit and jizz slickened shaft through Dana's abused gullet. She kept a paw on her friend's belly, watching and feeling it expand with each pulse of delight that rocked through her. This was her favourite part as a human. The sensation of expanding, of being stuffed so full of a mate's virility was one nobody could forget, or forsake. Each burst of seed was an adrenaline rush. The fear that she might burst, or that they would somehow seep into her womb, had been omnipresent yet delightful.

If only Dana had a cock of her own. One so big and flexible they could fuck and inflate each other. She shuddered, an image of herself impaled on a cock bigger than she was tall, with a belly so huge it spread across the ground, while her own shaft stuffed Dana, whose belly matched hers. Still more seed pumped from her cock as she groped her tit to the fantasy. Perhaps Dana would also transform soon.

What would she be? Prim pondered while she massaged the jiggling mass of her roommate's belly. The milky skin had turned a harsh shade of red, strained and shiny from its abuse. It wouldn't damage her, though. Her belly button popped out as she eclipsed the nine-month pregnancy mark, and resembled a nipple in Prim's lustful eyes. Yes, she thought with a lick of her muzzle. Her desire manifested as drool fell from her chin.

Dana had a lazy streak in her. Some days she wouldn't get out from bed, except for the bathroom, and had a stockpile of snacks stashed underneath it. Almost like a cow. A big, milky cow. Good for two things; milk and breeding. Prim rubbed at her roommates belly, imprinting the image of a huge, milky udder upon it. Better yet, she thought and ground her still heavy balls into Dana's tits. Why not have it all? Massive, milk swollen tits. Four of them. Each bigger than Prim's own.

And her ass too. Dana would have the juiciest ass, greater even than the horse Anthro four doors down, perfect for sinking into and grabbing while she was rutted like breeding stock. Prim giggled in her craving for such an outcome, a lewd, deranged smirk on her petite muzzle. Still amidst her climax, Prim jumped to her feet, extracting every foot of her dick and moved to Dana's legs. She forced them apart and gazed upon her roommate's panties.

They were taut against her swollen mons and drenched. The inside of her thighs were no better, rivulets and strings of juices clung to and slid down Dana's skin. Prim swiped her paw along her friend's skin, gathering what she could and licked it clean. Tart and sweet, thick and slick, and brimming with the desire to be fucked.

Prim's still cumming cock replaced the fluids. She couldn't wait another moment. Every cock's one goal was mere inches away, within which laid her sperm's greatest dream. Eggs. How many wasn't important, only that they were there. And waiting.

She tugged Dana's panties aside and tucked it behind her engorged pussy. Even after the night she'd had, Dana remained tight-lipped, her labia tucked inside. Prim used two fingers to push the folds open and salivated at the pink insides, before her cock repainted it in white. Her orgasm was slowing, but she was confident she would reach another.

Dana made no acknowledgement to the blazing seed splashing across her privates. Even as Prim pressed her massive head into the plump vulva, even as her lips parted around such a huge mast, even as cum exploded into her canal, she remained lost to the world. Her body reacted, though. It went rigid as her insides spread wider than they had for anything before.

"Hmm, fuck yeah!" Prim grabbed her roommate's thighs, deliciously soft and meaty, and pulled as she inched forward. A stubborn stood against her before long. She moaned and shuddered. Beyond that tiny wall, so small and fragile compared to her iron cock, was Dana's womb. That thought spurred her powerful hips in action.

Dana, finally, responded, "Holy fuck!" She yelled and sparked to life. She propped herself up, a struggle with her belly so robust, and stared down at her roommate, now lover, and the tube-shaped bulge in her crotch. It vanished into her gut. Her skin was so tight around Prim's cock the rabbits heartbeat was visible through her flesh.

Prim moved deeper. She angled her hips skyward, crushing Dana's g-spot, until the flared crown of her dick bulged into view, "Welcome back, Sleeping Beauty."

"Prim, this... oh fuck! It's so good," Dana circled her hips, stretching her snatch in every direction. Her belly expanded further with Prim's dwindling orgasm. Thick globs escaped her pussy, forced out by the sheer majesty of Prim's dick. The flow into her womb subsided before long, "No! Keep cumming!"

"Hold on," Prim grunted and reared back, the bulge of her cock sank back as she pulled a foot dick out, leaving one inside. By her estimate, her member was over three feet long, not quite four but close. And every inch of it was destined for Dana's cunt.

"So big," Dana whispered. Prim smirked and rammed forward. Her roommate arched her back, announcing her gravid belly to the world as the cock shape returned, more pronounced than before. More, more and more squeezed inside until, with a lurid pop, the knot entered.

Prim leered over her friend, monumental tits rising and falling with her breaths. She raised Dana's hips high until she was almost bent in half, with her breasts and belly in her face, and stood. The rabbit held Dana's legs in place as she bucked her hips and swung her balls into the human's ass. Its cheeks jiggled under her force.

"Hot," Dana moaned. Her hands roamed across her body as salty droplets built and broke across her skin, coursing over her skin. Hair matted to her drool covered cheeks. Her tongue lolled out like a panting dog as she was fucked. A similar red hue as her stomach spread to her face and ass, though the latter was a product of Prim's ever escalating thrusts.

Prim paid her no mind, fixated on reaching her next climax. She imposed her image of a transformed Dana over the real thing, envisioning her monumental ass bouncing and tits and udder jiggling while they sprayed milk all over, while a fluff-tipped tail flicked and she mooed in ecstasy.

"AH!" Dana exclaimed. Her snatch clenched tight around Prim's cock as a rush of juices splattered against the rabbit's crotch, still Prim hammered her, setting a crushing pace even as the walls clung to her like a vice. They conformed around her shape, as did Dana's belly. Its strain had turned it an odd shade of pink in Prim's eyes, though she ignored it. She needed to cum inside this womb. Properly. She couldn't leave it to stew in her leftover jizz.

"Fuck, fuck, fuck! P-Prim?" Dana placed a hand atop the rabbit's, who glanced up, though her tempo didn't slow, "Something is... something's happening!"

It couldn't be. Prim shook her head and stepped up the pace, desperate to cum. Dana's pussy tightened further, as if constricting -- choking -- her dick, but the knot prevented it. The further depths clenched as she left, before she parted them once more. After a while, the tightness abated and was replaced by an inferno, reminiscent of the heat Prim experienced less than an hour ago. She blinked and focused on Dana's ass.

"I think... oh god, don't... fucking... MOOOO!" Dana shrieked as she came again.

It is. Holy shit, it's happening. The flesh around Dana's ass and thighs rippled and swelled. Prim's testicles slammed against her roommate's cheeks, with each cycle they became better pillows for her. Her paws sank into Dana's thighs as they thickened.

Keep going, Prim silently urged. She folded over to press herself flush against Dana's softening form. Sublime fat pressed into her from all sides. Dana wrapped her legs around the rabbit's waist, turning her thrust to vicious jerks. What would she become? A cow as Prim hoped? Oh god, let her become a cow. The perfect breeding cow, built to take Prim's cock and cum and beg for more.

"That's it, Dana," Prim panted. She lowered herself further and further, until her belly curved around Dana's and their faces were so close they almost touched, the stench of lust pervaded the human's skin. It was in her sweat, her drool, her... milk. "Yes!" Prim cheered and lurched forward. She latched onto a nipple and inhaled, sweet and creamy whiteness filled her muzzle and coated her throat.

"Hmm, I'm... I'm gonna be a..." Dana trailed off. Her eyes rolled back as Prim's knot swelled. The girl's stomach shrank to a trim curve, before puffing out and out. In tandem, Dana's tits swelled, pushing Prim back.

Prim moaned and shivered with her burgeoning release. A bit more. She craved more. Pleasure, sex, milk, Dana's transformation. Please, she pleaded to whatever god might listen, turn her into my fantasy. Make her ass wider, curvier, turn her tits into milk fountains, give her an udder, give her extra boobs... make her perfect.

The vision of lewd delight in her mind pushed her over the edge. Every ounce of pressure in her gut crashed into her. She pressed her muzzle deeper into Dana's expanding tit to suppress her shrill ecstasy. A fresh fire formed across her cock as it changed still more. It wasn't uncommon for the transformation to have some aftershocks, but she wondered what might change this time. Prim managed to pry herself Dana and straighten her posture to look down at the transforming girl.

Her tits had tripled in size and her belly was a dull pink tone now. Four points poked from its peak. Atop her growing udder, rested a second set of smaller breasts, slowly growing to their own monumental proportions. Prim gripped her lover's thighs. Scarce hints of muscle betrayed the dense layer of fat, which collapsed under her paw. All the while, semen pumped into Dana.

Prim turned her attention lower. Fine hairs sprouted around Dana's pussy, now fatter than ever with a huge clit to match, and stretched taut around Prim's knot. Slightly higher, the rabbit saw a series of bulges travelling along the tube of her cock. A small change, but one she enjoyed. Instead of a series of spurts or a constant stream, her cum exploded in a series of orbs, one after the other. Each one stretched her dick wider than her knot, stimulating every nerve-ending along the way.

Each pump seemed to progress Dana's transformation. One ball of cum released and the girl's teats came to life, another and her face extended further into a wide, flat muzzle, a third one forced her to tits to swell even greater. The nipples were monsters all on their own, each at least three inches wide and four inches long. Prim grabbed the largest set and wrapped her padded fingers around them.

"Yes, Dana," Prim moaned and kept pumping her hips. Her knot caught on Dana's cunt lips, they kept her buried inside, where her cum would be best spent, "Grow for me. Be my perfect cow."

"Ahh! Y-yes!" Dana rasped. Her fingers curled and clawed at the carpet, nails turning black and blunt, while her legs cracked and popped into a new, digitigrade shape. Her toes merged and also turned black, forming her new hooves, while her thighs swelled with fat and strength, designed to support her new, extreme figure. Yet not an ounce of muscle was visible.

"Moo for me," Prim said.

"Hmm, moo," Dana sighed as her belly continued to swell, her udder filled with milk and her womb swelled with cum, marvellous duo. She went limp at a slight, abrupt orgasm rocked her. The transforming cowgirl stared up at Prim, the rabbit steadily vanished behind Dana's tits and udder. Before long, both her change and Prim's climax slowed, then ceased.

Minutes passed before Dana roused from her cum-induced stupor. Prim sat on her bed, marvelling at her body, running her supple paws across the tight flesh over her powerful hips and thighs, up her sleek gut and around her mammoth tits. Yet she paled compared to the cow before her. Dana rolled onto her side and moaned as her boobs and udder pressed against the floor.

"Wow," the cow said.

"That certainly fits your new ass," Prim said.

"Hmm, yeah," Dana smirked and reached back to cup her gigantic ass. She sat back and found herself raised several inches by it, "It's like a cushion." Her tits, all four of them, obscured her swollen belly and udder from view as they filled her lap. She studied herself, curious about the odd colouration of her fur. Like the average cow, she had several spots. Instead of black on white, though, her spots were a striking golden hue, and the rest was a deep violet. A final surprise awaited her.

"You're bigger than me in every way," Prim smirked, "Except three."

"Huh?" Dana blinked, slow as her brain worked to catch up. She pushed herself up to her hooves and steadied herself against the wall. Now she noticed. How couldn't she? Her cock and balls rested atop her suffocating thighs, which left no gap, each impressive. Prim tossed a tape measure from paw to paw.

"Two and a half feet when erect. One while soft. Balls are half a foot in diameter. Each. Mine, however," Prim hopped to her feet and presented her magnificent crotch in pride, "Is three feet, eight inches erect. Two while flaccid. And these," she giggled and hefted her magnificent balls in her dainty paws. They sloshed with cum, already full again after three orgasms, "Are two feet in diameter. They weigh, like, a fucking ton!"

"Moo?" Dana clapped a hand over her new muzzle, "Shit, I hope that doesn't happen often."

"I think it's cute," Prim said. Her grin refused to disappear. Dana was almost as exactly she'd hoped; a cow with four tits, an udder, the biggest ass around and, if she was correct, a true need to be bred.

"Thanks," Dana rubbed at her upper belly, above her udder, "My womb feels hot."

"Your womb?" Prim arched an eyebrow. Most women couldn't feel their womb. They normally blamed any burning or aches on their stomach or other organs.

"Yeah. I-I can feel it. It's so fucking hot. That's not your cum is it?"

"Might be," Prim shrugged.

"Oh, fuck," Dana groaned and staggered over to sit beside the rabbit, "It wants cum. I think."

"Huh?"

"Just..." Dana crawled onto the bed and turned, presenting her titanic rear, "Just fuck me more. Cum inside me. Give me babies."

"You're probably already pregnant," Prim said even as she stroked herself back to an erection.

"Moo," Dana sighed contentedly and arched her ass higher, "Yeah. I feel it so clearly. Your sperm. My egg. But I want more. I need more."

"Dreams do come true," Prim giggled and slid her flat head along Dana's drenched folds.

The door opened. Prim whipped her head around and saw Stacy, a mutual friend of her and Dana's, step inside. She was a human. Short red hair, pale skin, freckled cheeks, and a gorgeous set of tits that extended past her navel.

"Hey, Prim, do you have a... hairbrush I... can... uh..." Stacy trailed off and swayed. Prim took a sniff and realised how thick the pheromones in the air were, as was the delicious stench of her and Dana's rut. It was too late for Stacy the moment she took a single breath.

Prim and Dana glanced at one another and beamed in joy.

"Why don't you come in Stacy? Let's show what we've been up to," Prim said. The redhead closed the door as if in a trance and walked in.

Oh, this would be amazing. She really loved being an Anthro.