The two scientist girls were on the floor rolling in agony, the pain was unimaginable, it felt as if the girls were exposed to acid, their entire bodies felt like they were on fire, Katie was probably suffering the most, trying multiple times to get up, only to fall down again, Tiffany felt her head spinning due to a nausea, "When will this be over?!" shouted Tiffany, with a desperate voice, "A better questions is.... Hng... What will we turn into!" replied Katie, as she kept trying to get up.
Eventually the pain passed, both of the girls slowly got up, Katie leaned on a research table, meanwhile Tiffany's nausea disapeared, allowing her to stand up without any form of support, "I-Is it over?" asked Tiffany, only to be replied with a feeling of heat spreading through her entire body, "Th-That answers your question!" replied Katie, only to then gasp as she felt a distinct flash of heat in her groin, the two researchers started to pant as pure lust washed over them, and alongside this sudden erotic desires, small horns began to develop from their foreheads, meanwhile their ears also grew.
"Arrgh! It's so hot!" Groaned Tiffany as she removed her lab coat, remaining only in a white tank top, still feeling hot, in desperation Tiffany quickly undid her jeans, tossing them aside, she looked at her panties and saw that she was developing an udder! "AAAAAH!" Screamed Tiffany as she stared at it, "Katie! We're turning into cows!" said Tiffany with a scared voice.
Katie quickly removed her lab coat, also remaining in a tank top, the heat kept building inside her groin, making her feel much hotter than Tiffany, making her also remove her pants in desperation, to her suprise, she saw a distinct bulge forming inside her innocent blue panties, she saw a weird patch on the center of them, in fear and yet wonder, she moved one of her fingers towards the patch, it felt like something wet, eventually the bulge escaped her panties, revealing that Katie was growing a manhood!
"Hnagh! Tiffany you're turning into a cow! I'm turning into a bull!" Said Katie, as her new member throbbed demandingly, meanwhile Tiffany watched as milk started filling her udder until it began to ache, the lust began growing and growing, finding it harder to resist the urge to touch themselves.
"Hng! I can't take it anymore! I must..." Started Katie as she quickly wrapped one of her hands around her pulsating phallus, making her moan as her soft skin touched the hard developing shaft, meanwhile Tiffany squeezed one of the teats of the udder, to drain some of the milk away, she hated to admit it but it felt good, as the two girls started to touching themselves, the changes quickly picked up the pace, their legs swelling.
Their lower bodies started to become much heavier, Katie's horns began to grow much larger as her muscles began to develop, giving her a terrifying masculine appearance, her breasts disapeared as they were replaced with rock hard pecs, meanwhile a tail snaked free from her panties, meanwhile Tiffany also grew a tail, her udders became much more heavier as milk almost completly filled them, meanwhile her breasts seemed to grow, even with human noses the two girls could smell the musky, animal scents emenating from themselves, making the lust even more maddening and hard to resist, Katie's manhood began to grow much bigger, and Tiffany's udder was filling with milk faster than she could drain it.
Tiffany looked at her nails and saw that they were darkening, black and white fur started quickly spreading from her hand to her arms, suddenly realizing something, "Oh god! Katie the changes will accelerate if we touch ourselves!" said Tiffany, as her udders produced more and more milk, completly destroying her panties as milk kept leaking from the teats, her breasts also grew more and more, pressing against her tank top, "W-What?!" shouted Katie as she also looked at her fingers, watching as her nails became much harder and darkened, black fur covered her hands and slowly reached up towards her muscular arms, her growing muscles made her tank top feel tight and without hesitation, she quickly ripped it off, revealing that she grew a six pack, her panties also felt tighter as she quickly removed them, letting a pair of heavy testicles filled with bovine sperm drop free.
The shoes of the two girls were destroyed, revealing that their feet painfully shifted into hooves, black fur quickly started covering Katie's muscular legs, meanwhile black and white fur started covering Tiffany's legs, "D-Damn it... This is torture! I don't want to be a cow!" shouted Tiffany, as she desperatly squeezed the sides of her udder, letting streams of milk gush out, "Atleast you're still a woman! I'm turning into a horny fucking bull!" shouted Katie in anger, as she stared helplessly at her massive phallus, and pendulous aching testicles that cried for release.
Katie stared at her muscular hands and then looked at Tiffany's changing form, in a moment of clarity she realized something, "Wait a minute, if we were turning into cattle, then we would be standing on four feet, and yet we're still standing on two feet?" thought Katie, suddenly, the light of the moon escaped through one of the windows of their laboratory, bathing both of their changing forms in the silver rays, making them feel stronger, make the changes faster and increase their lust.
Tiffany's breasts completly destroyed her tank top, revealing that just like her newly formed udder, were also filled with milk, leaking from the dug, "Oh gosh Katie! I'm sooooo..." started Tiffany as she quickly squeezed one of her breasts with one of her hands, milk spilling out from the teat, meanwhile with the other hand with squeezed one of the teats of her udder, also spilling milk out of it, the changes quickly accelerated as fur slowly traveled up to her torso reaching her neck, her nose quickly cracked as it changed into one of a bovine, inhailing the musky scent coming from Katie, her face quickly pushed into a snout as fur covered her ears and face, "Moooooo!" bellowed Tiffany as she finally turned into a werecow.
Katie couldn't contain herself, or rather himself, and quickly warpped both of his hands around his throbbing phallus, which was leaking with droplets of pre, "Gngh... Yess... Mooooore!" Groaned Katie as his voice became more masculine, fur quickly started covering his entire body as his nose also cracked and shifted into one of a bovine, he smelled the scent coming from Tiffany, his mind was filled with erotic desires, he quickly pounced on the werecow before him and held her firmly onto the ground, with one hand he squeezed one her milk-filled breasts, with the other one he squeezed her udder, letting the milk enter his mouth, accelerating his changes, his hair changed into fur as his face completly shifted into one of a bull, Katie bellowed as he was now completly turned into a werebull, but his member needed release, before he knew it, the werecow before him started licking his member, slowly taking it all in her mouth, it didn't take long for Katie to climax, filling the werecow's mouth with his bovine seed.
The two girls now transformed into a werebull and werecow kept pleasuring themselves, in that night at the secret laboratory, bellows, moans and sighs of pleasure emenated from the laboratory, as it was filled with their scent.