Anton, the man of the family

Heather looked up from her mother's sweaty back to see her father, Anton, standing in the doorway, frozen at the sight he had walked in on. His older daughter was balls deep in his wife, who appeared to be cumming hard at the penetration. Meanwhile, his younger daughter was writhing on the floor, cum and moans oozing from her used snatch and mouth while she was remade. Her chest was swelling into twin mountains of tits, while her widening hips framed the dick that was slowly growing from her crotch. The organ was still flaccid, but it had already reached over five inches long and didn't seem to be slowing at all.

"Oh, Papa, you made it," Heather said, somewhat surprised that her father hadn't fallen to any of the futas that filled the bunker. "I thought for sure you would have found a nice pussy to fill with your spunk. I found two, though this one's still a work in progress." She slapped her mother's large ass, earning her a shaky gasp from the unchanged woman.

"Heather, what have you done? Do you have any idea what's going on in this bunker?!" Anton shouted, completely livid. The brunette futa pulled her aching dick out of Agnes' cunt, letting her slump to the floor. She started walking towards her father, only to be stopped by Jill clinging tightly to one of her legs.

"Well, if I had to guess, I'd say a whole lot of fucking. That's what I've been doing, at least. But you interrupted me just as I was about to finish. You should know it's no fun getting blue-balled." She started to stroke herself as Jill's limp dick reached its final length of 16 inches. Leaning down, she adjusted her sister so she was kneeling and looking up at her older sister. "Luckily I've got someone else to help me with that."

Without warning, she **** her slick cock into Jill's mouth, giving the girl a taste of her sister's cum and her mother's and her own cunt. Jill's eyes went wide before rolling back in her head, gulping down every bit of the fluid covering Heather's dick as her own shaft filled with blood. It extended and grew, getting longer and thicker until it was the same size as her torso in both length and girth. Jill started to fall over from the weight of it, only to **** more of Heather's cock into her mouth and throat. Heather moaned as her sister's tight throat tripped her orgasm. The ensuing tide of cum was more than enough to trigger Jill's first male orgasm, making her blast a gigantic load of semen onto Agnes' face and huge tits. The older woman eagerly lapped at her daughter's cum, sucking it down and beginning her own transformation.

"See Papa, doesn't Jill look happy cumming her brains out with her huge fucking cock? That's all it is, we just want to feel good. Do you want to feel good too?"

"He does, he's just afraid to admit it," Agnes said, her body mostly clean of cum. Ripples washed through her every few seconds, and she couldn't keep stray moans from coming out as she was changed, but she managed to stand up and grab her husband. She ignored his yells of protest as she pushed him down on his hands and knees before pulling his clothes apart. "Go on Heather, show him just how good it feels."

"Ooh, I've never had an ass before. I hope you enjoy being my first, Papa!"

"No Heather, stop, we can stop this just let me g-aaaghh!!" Anton screamed as his daughter's huge futa dick **** its way into his tight ass, the massively lubricated shaft pushing steadily into his butt.

"Ohhh, FUUUUUUUCK!!" Heather yelled as the head of her dick pushed deeper into her father's ass. It was even tighter than Jill's virgin pussy had been, squeezing her tightly. She tried to hold back, but the feeling was too incredible, too good. She only managed to pull out and thrust back in once before she was dumping the contents of her balls into Anton's ass, her pussy squirting at the same time.

"I'd love a turn at that too," Agnes said, watching her daughter pump her husband full of transformative cum. Her own cock was quickly forming, getting longer and longer as her boobs firmed up slightly before getting even bigger. "Oh look, he's cumming. You must be really good, Heather." Anton's dick was shooting its measly load as he endured the feeling of semen filling his ass with clenched teeth.

By that point, Agnes' cock was standing proud at just over a foot long, hard and twitching to have its contents emptied. She couldn't help but position herself in front of her husband, aiming her cock for his shifting face.

"Don't worry Anton, you'll feel much better in a few minutes. How about you suck my girl cock in the meantime?" Anton's mind, already fading under the grip of the virus, couldn't say no to his wife's suggestion. He leaned forward even as his chest shifted, becoming less muscular and much softer. His face changed into a freckle-covered woman's as the last of his male mind disappeared, replaced with only a base instinct for sex.

The new woman went to work as her tits grew in, first small swells, then larger. They got to the size that they hung on her chest from their weight, two heavy tits with more freckles scattered across them. Her hair became even more vibrantly red, nearly the same hue as her flushed cheeks as she slurped on Agnes' dick. She bucked more enthusiastically on Heather's cock, enjoying the fullness of her ass instead of dreading it. Her thighs and ass thickened as her waist shrunk slightly, giving her a slight hourglass shape. Her cock didn't change much, growing a few inches, but nowhere near the size of any of the other women in the room.

The new futa looked imploringly at Agnes, who was rapidly approaching her own orgasm. The sight of her former husband's begging eyes staring at her from a cute, feminine face was all it took to send her over the edge. Agnes couldn't keep herself upright, the feeling was so intense. She fell to the floor, hips jerking as she sprayed cum all over herself and her changed husband. Semen dripped from the former man's face and open mouth, falling on and between her proud, weighty tits, speckling her tanned, freckled body with white.

"Fuck, that was hot. Don't you think Jill?" Heather asked. Jill was too absorbed with her own cock, the enormous organ looking like another person fused to her waist. The sex-drunk girl had her arms wrapped around her cock as if she was hugging it, jerking herself off with her whole body and being rewarded with powerful blasts of semen that looked like they came from a pressure hose. Heather wondered what it would feel like to have that in her cunt as she lowered herself down on her changed father's cock. It might be too late to have him really fuck her, but she was fine settling for the slut Anton had become. She wasted no time in setting a face pace, eager to feel the redhead paint her walls with futa semen.

Hours later, the door to the bunker slowly slid open, letting in a fresh gust of air. Just inside the door were the many transformed occupants of the shelter, now all hung futanari. They had momentarily worn each other out with endless orgasms after hours of sex and countless loads over every conceivable surface of the underground building. In a moment of clarity, Heather had rushed to the control room and opened the bunker before she could lose herself to orgasm again. As soon as the door was fully open, the transformed occupants rushed out, the crisp night air igniting their lusts anew. Distant moans filled the night, signalling the presence of more Infected, and hopefully some normal humans too. Lured by the sound of sex, the busty futas all hurried off into the night, leaving the cum-soaked bunker behind in favor of fresh pussies and cocks.