Nicole can, but she's outnumbered

"Wha-what is this? Cade, how are you this...thing?" Nicole stammered, her sensibilities overcoming her desire to drop to the ground and suck her transformed husband off. Her children, however, had no such qualms, shoving past their mother despite her protests.

Bryce dove straight for his demonized sister, only a year older than her, pulling his pants off and pushing his hard cock into Caroline's oozing pussy, both of them moaning as their bodies joined. The virus was instantly transmitted to Bryce, who started feeling its effects almost immediately. Balls deep in his succubus sister, he had no reservations, allowing Lilith's strain of the virus to quickly begin transforming him, increasing his already respectable muscle mass and making his genitals swell.

Jenny likewise stumbled to her knees in front of Lilith, looking up at the first succubus with fear and lust. She was pretty, same brown hair as her sister, but curlier. She had inherited her mother's bust, proud D breasts hanging on her chest. Her ass wouldn't turn heads by itself, but combined with her rack, she was a knockout at 22.

"You want to be me, darling?" Lilith asked, stroking the young woman's face with her pointed claws. "You want to be perfect? I can help you." She slipped a finger between her legs, dipping it into her corrupted cunt. She offered the finger covered in her juices to Jenny. "Taste and embrace it." Jenny stared at the dripping finger for a second before lunging forward and sucking on it. As soon as Lilith's finger was clean, Jenny moaned and dove for the succubus' cunt, tongue searching for as much of the delicious fluid as she could find. "Mmm, yes, that's a good girl. Yes, right there," Lilith gasped as Jenny's growing tongue pushed deeper.

Nicole watched in shock as her children rutted with Lilith and each other, rooted to her spot. She didn't even notice her husband behind her until he grabbed her shoulder.

"Isn't it wonderful?" Cade growled in her ear. "Look at how close the kids are." He twisted her head so she was looking at Bryce cumming in his sister, horns sprouting from his deep red scalp. "You know what they say, nothing brings a family together like a little demonic ****. And Jenny," Cade looked at his oldest daughter as her ass rounded out. "I can't wait to fuck her like I did my other little girl. But first things first, my love." The incubus brutally twisted his human wife down to the ground, her face level with his throbbing dick. "You were always good at giving head. Let's see how you fare when there's a little more to work with." He jammed his cock into Nicole's mouth, ignoring her hands beating at his thighs and her watering eyes as he pushed down her tight throat. "Yesss...just like that..." He laughed as his wife's face started to turn purple, pulling his dick out long enough for her to take a few gasping breaths before shoving himself back into her throat.

"Oh, yeah, Daddy, give it to her good. I had no idea Mommy sucked dick so well. I'll have to have her teach me once she's a slut like her children." Caroline said, looking up at her brother, who was pumping his big demon cock between her fat tits, blobs of jizz shooting out of the flesh valley to spray onto her face. "Fuck, sis, you've got to try this dick. Your little brother's been holding out on us."

Jenny was too busy guzzling Lilith's girlcum to answer, licking at the senior demoness' tainted pussy with abandon, bringing her to orgasm time and again, ignoring her own sopping twat to service her mistress.

"Oh my FUCK, you're so good, girl. Yesss, such a good girl," Lilith moaned, running her hands through Jenny's darkening hair. The 22-year-old whined and grunted animalistically, fur sprouting down her spine, the rest of her skin shifting to pale gray. Her D-cup breasts ached, but didn't grow at all. Beneath them, another pair of nipples appeared, quickly swelling out to form another, equally large pair of tits. A thin, whip-like tail grew from her tailbone, wagging in the air. Her legs became digitigrade, forcing her to all fours and letting her heavy boobs hang freely. Her ears shifted from the sides of her head to its top, becoming pointed and covered in tufts of black fur. Finally, her face stretched out slightly, forming a half snout without taking over her human features entirely.

"Fuuuuuuuuccccckkkkk...." The new hellhound moaned as climax rippled through her as her transformation ended, her new animal instincts rooting themselves in her mind.

Meanwhile, Nicole was still **** on her husband's enhanced cock, though her gag reflex had disappeared. She found herself licking the underside of Cade's shaft and was unable to stop. He tasted good, she realized. Better than he ever had before. His musk was making her heady, reducing her fear and heightening her arousal even further. Before she could stop herself, her hand slipped into her pants and poked at her clit, her slightly sagging bust shaking as she jerked.

"It feels good, doesn't it?" Cade asked, his tone gentle. "My mistress showed me the futility of hiding it. It feels so much better to just give in and embrace it. I always wanted to fuck every hole I saw, and now I can. And you can get spit-roasted, like you always wanted to." He snuck his cock tipped tail down between their legs and **** it through his wife's pants, filling her pussy with a single thrust. Her eyes rolled in her skull and she began fucking herself on his tail.

"Shiiiitttt..." Cade grunted, his balls clenching as the tightness of his wife's throat overwhelmed him, virus-filled seed burning a path down her throat. The taste was mind blowing and she could feel every burst as it traveled down her husband's massive pole and fired against her larynx. The thick cum filled her stomach, sitting like a weight inside her as her arousal spiked, the virus in it diffusing into her body. "Do you want to cum yet?" Cade asked as her cunt spasmed around his tail. Nicole nodded slowly, her lust finally overtaking her rationality. "Of course you do. You're a slut at heart, just like your daughters. You'll be just like them, a moaning whore begging for cock. So cum and embrace the change!" he yelled, cock and tail shooting another load into her holes.

Nicole felt the hot cum flow into her again and finally gave up. She knew there was no escaping her urges, so she might as well enjoy it. As soon as the thought passed her mind, her skin felt like it was burning, but instead of pain, pleasure consumed her. She came, harder than she ever though possible, coherent thought becoming unnecessary in the face of such pure pleasure. She pushed Cade's dick further into her throat, sucking for all she was worth even as her body screamed for oxygen, the thrill adding to her incredible orgasm. Her already purplish face shifted a hue darker and spread, tracing down her neck and across her body. Her eyes shifted into slits and her hair darkened to lightless black, ears pointing, and mind rewired to feel only pleasure.

Her body convulsed in waves, her belly undulating as the fat of giving birth to three children and middle age shifted, moving in either direction. Her breasts surged to prominence, the aged flesh surpassing what it had been at her peak, creating wobbling peaks of woman-flesh. Down below, her butt swelled, surpassing her daughters' in size and becoming that of a MILF pornstar, eager to be squeezed and slapped. Her already wide birthing hips changed slightly, ensuring that her ass would always be pushed out and on display. A tail of her own shot out of her spine, thrashing in the air before diving down to join her husband's, stretching her used cunt wider even as the muscles strengthened and tightened, nearly making her cum again. Claws sprouted from her hand and feet, digging into the wood and Cade's thighs as she continued to **** herself on his hard member.

With one last pulse through her demonized body, her transformation and orgasm ended. She finally pulled her husband's fat rod out of her throat, falling to the floor as her new chest heaved. As soon as she gathered her wits, she looked down at her purple succubus body.

"Mmm, fuck, I've got such perky tits now. It'd almost be worth it just for these," she said, pinching and pulling her mounds around her chest, pulling them to the point of pain. But instead of discomfort, all she felt was a rush of joy, her brain rewired to interpret pain as pleasure. Nicole rolled over, pressing her enhanced boobs against the floor and making them pillow out. "They're nothing compared to this ass though. What do you think, baby? Good enough to cum?" she asked, jiggling her large rear seductively. She was thrilled when a burst of cum landed on her curves, the mere sight of her wobbling ass enough to make her corrupted husband spurt. "I can't wait to milk a cock dry."

Through it all, Lilith reclined in a corner, watching the family corrupt themselves and each other. Slowly rising to her feet on legs still slightly shaky from her repeated orgasms, she stepped towards where the demonic family was crowded around each other, petting, squeezing, and licking each other. Jenny the hellhound was slurping on her father's cock, her human intelligence competing with her animal desire to be bred. Bryce was sucking on one of his mother's fat purple tits, Caroline licking at the other. Nicole's hand was between her son's legs, rapidly moving up and down her son's titanic cock. Cade was allowing his transformed daughter service him and pumping his fingers inside his other daughter's still cum-slick cunt.

"Enough of that," Lilith snapped at the demons, wresting their attention away from each other and towards her. "As much as I'd love to fuck all day, my master has bigger plans than an incestuous orgy. I am going to fuck as many people into demons as I can, and you studs and sluts are going to help me." Her words captured them, fixing their minds on infecting as many others with Lilith's strain of the virus as they could find.

"I know plenty of people who would be perfect," Bryce said, guiding his younger sister's hand to his throbbing cock, helping her jerk him off. "I could get a bunch of my friends over here and we could infect them. I bet half of them wouldn't even resist, they'd love to be sex machines."

"Bryce, I had no idea you kept such terrible company," Nicole cooed, running her fingers through her son's hair. "You'll just have to introduce me to some of them. I should thank them for taking such good care of you." Bryce grinned maliciously, capturing his mother's plump lips in a kiss and biting into her tongue, making her moan joyously.

"A perfect idea," Lilith said, already thinking about all the young soon-to-be demons as the family steadily returned to their fucking. "Get them over here, I need a buff frat boy's cock in my cunt." Bryce nodded and fished his phone out of his discarded pants, sending out a mass text to his friends as his hellhound sister gave him a double boob job with her four tits.