Time for a family reunion

"I think I'd better go make sure my family is alright," Heather said, a lusty grin in place on her face. "Wouldn't want them turning into futas without me." She staggered out the door, legs still unsteady from being fucked so thoroughly. Finally knowing what it was like to take a girl's cock up her cunt, she couldn't stop thinking about what it would be like if it was her cock doing the filling. She panted at the thought of warm wetness wrapping around her, idly stroking her forever hard dick until she shot a relatively small load of semen onto the floor. She didn't bother stopping, instead pushing through her orgasm and rushing towards her parents' room.

"Mom, what are we going to do?" Heather heard Jill, her sister, say on the other side of the door. "The bunker is overrun, it's only a matter of time before they find us!"

"It's okay, sweetie, we'll be alright. Your father will be here soon, he'll have a plan." Heather listened to her mother, Agnes, comfort Jill a moment longer before opening the door and stepping inside.

"I'm not Papa, but I've got a plan," she said, immediately pulling her mom and sister's eyes to her. They both had the same brown hair as her, though Jill's was slightly darker. Jill in general looked a lot like their cousin Jenny, speaking to their shared blood. Heather stared unashamed at her younger sibling's tight booty, already wondering if it felt as good as it looked. Then there was her mother, the picture of mature beauty. She was quite slim for having had two children everywhere except her chest. Two mountainous tits, nearly as large as her own, sat heavily on Agnes' chest, begging to be squished and grabbed.

"Heather, what..." Agnes started to ask, the words fading at the sight of her transformed daughter.

"I'm infected, Mom. It turned me into a sexy bombshell with my own cock. And I've been running around making everyone else a futa too. Jenny found out first, she looks so much hotter now. Then Monica came and sucked me off, she looks a lot better too. We're all super sexy, horny dickgirls and I wanna give you two cocks of your own."

"No, Heather, please don't..." Jill begged, fear filling her eyes. The nineteen-year-old trembled at the sight of her sister's erect shaft, afraid of what it meant for her.

"It'll be okay, Jill. Plus, it's better this way. Everyone out there is just like me, horny fuck machines ready to pump their hot jizz inside of anyone with a free hole. You can either get fucked by them, a random stranger, or by me, your sister. I know which one I'd prefer." Heather couldn't keep the open desire she felt out of her voice, but it didn't make a difference. Jill continued to cower with fear, clinging tightly to her mother.

"Everyone's like you?" Agnes asked, gently stroking Jill's hair to try and sooth the girl.

"Maybe not everyone, but they will be soon. There's not exactly a lot of places to hide. We'll find them all eventually."

"...you said Monica looked hotter too?" Heather smiled at the question in her mother's voice, knowing exactly what she was asking.

"She's super sexy now. Her tits are even bigger and I'd die for an ass like that. Plus her cock is fucking massive. First thing she did with it was fuck her own tits until she came all over herself. I wish mine was big enough to do that with..." Heather trailed off, momentarily caught up in her own fantasy. She came back to herself when she heard her mother shifting slightly, the older woman's face flushed. Heather smile grew, the well-endowed woman recognizing that look. "It doesn't hurt, you know. It just feels really, really fucking good. I've never cum so hard in my life. Cum tastes amazing, my titties are super sensitive, and I can go and go and go as long as I want. You know you want it. You just have to do one little thing."

"I don't want anything," Jill yelled, taking a small step forward. "I don't want to be some...monster like you!"

"Oh, sorry Jill, I wasn't talking to you." Heather said with a smile, pumping her cock back up to full hardness. The youngest brunette turned around to see her mother backing away slowly.

"Mom..." she begged, on the verge of tears.

"Sorry sweetie, but she's right. We can't get out. It's no better outside. Everyone's like this now. We're better off just accepting it," Agnes said, watching as Heather walked up behind Jill. The statuesque futa ground her shaft against her sister's butt, happy to find it just as good as she thought. Tears started flowing down her face as she realized her mother had betrayed her. She didn't even really register as Heather stripped her and poked her butt with her dick.

"Don't worry sis, it'll be okay. Once you cum once, you'll never want to stop. You'll see." The futa girl slowly pushed the head of her cock between Jill's legs, poking at the slit hidden there. She slowly started pushing in, moaning at the new feeling. It only took a moment to reach a barrier, keeping her from going any further.

"Looks like we're both virgins for this, sis. You're my first pussy, but I don't think it'll be the last. Get...ready.......FUUCKKK!!" Heather broke through Jill's hymen, pulling a scream of bliss from her lips and a cry of surprise and pain from Jill's. The younger girl's tears finally started flowing as Heather pumped into her again, and again, increasing her pace every time. Heather moaned with pleasure, her eyes rolling, as her pace knocked them both to the ground. The futa woman's hips slammed repeatedly against Jill's raised ass, loud smacks echoing in the room with each thrust.

"Ugh, nngaahhh, agh," was all Jill could moan, unable to stop the feelings that were coming from her soaked pussy. Her tears changed from ones of sadness to blissful as a flush suffused her face, juices pouring down her thighs. She could feel Heather's huge tits pressed against her shoulders, soft and cushy. She momentarily wondered if hers would become like that before another thrust of her sister's dick erased the thought. She felt a tightness in her belly that was only growing with each thrust, stripping any hope of struggle away from her.

"Fuck, you're tight, Jill. I'm gonna cum, cum deep in your pussy. Shoot my thick load all up in your cunt. You want me too? Want me to paint your insides with sperm?" Heather asked, falling deeper into her own spiraling bliss. Jill couldn't speak anymore, only moan and grunt with mind-numbing pleasure. "Here it comes...cum...CUMMING!!" she yelled, pushing her load of cum into her sister. The younger girl screamed too, the virus pouring into her as her own orgasm poured out, her pussy gushing with femcum. She could feel it deep in her body, changing her to become like her sister, something she no longer dreaded.

"One pussy filled, just you left Mom," Heather said, pulling out of her sister's twitching body, cock slick with both their juices. The brunette futa looked towards her mother, who was standing nearby, watching with rapt attention and roaming hands. She had already stripped down to her underwear, which she then got rid of, leaving her naked in front of her daughter. Wetness already trailed down the inside of her thighs, betraying just how much she loved watching her daughters fuck.

"How do you want me?" she asked her approaching futanari daughter, showing off her mature curves, particularly her enormous boobs.

"Same as the daughter you abandoned," Heather said, pushing her mother down. She didn't bother waiting, just shoved her entire dick into her mother's thoroughly lubricated tunnel. The older woman came almost instantly, squirting all over the floor. Heather went to work, fucking Agnes as deeply as she could. She watched as Agnes' mature tits squished out around her body, spread by the **** of their rut. Her mother came again, cunt gushing and squeezing her dick as their moans filled the room.

Heather was quickly approaching her climax again, ready to dump a wave of her transformative futa cum into her mother when the door slammed open, panicked yells filling the room. Momentarily distracted, Heather looked to see who had interrupted so rudely.