Monica already has her eyes on her

Tina watched from behind the table as her sister was used as a cock-sleeve by the ripped incubus, her small body looking even smaller compared to the towering demon. Jaydin was hanging bonelessly, allowing herself to be used, cum running down her twitching legs and constant stream of moans, grunts, and screams pouring out of her mouth. Tina could see the petite girl transforming just like the others, though her changes weren't nearly as significant. Fat deposits appeared on her chest, small breasts blooming into existence where there had been nothing, the tissue stopping at a small B-cup, capped by perky pink nipples. Her ass grew as her skin paled, creating a creamy white bubble butt. Her hips spread, giving the demon in her cunt something to get a better grip on. Her thin legs actually plumped up a good bit, her thighs still a bit thin, but with plenty of gentle muscle underneath, emphasizing her soft tush.

The demon fucking her gave one last growling grunt and filled her with another thick load, the outline of his hard shaft visible on Jaydin's pale stomach. Finally spent, the incubus pulled out of the slender girl, a flood of jizz pouring out of her stretched pussy to splatter on the floor. Jaydin joined it a second later as the demon dropped her to find new prey. The changing girl continued shaking on the ground, the last of her orgasms running their course as the virus finished its. Thin black wings grew out of her back, a tail joining it. Small little horns crept out of Jaydin's scalp as her hair went from gold to white, shot through with a faint hint of pink. Finally, her twitching stopped, her eyes closed in bliss.

"Sounds like she's done," Tina heard her mother say from where she was still riding her father. The young woman slowly turned to look at her mother, struggling not to shudder at the sight. Monica's skin had turned red, matched by now-black hair that reached the base of the woman's spine. Her body was as sculpted as all the others, proud, wobbling tits, a firm, bouncing ass, toned stomach and thighs. Additionally, two monstrous appendages had grown from her back, like massive spider legs, sharp hooks on the end gouging out chunks of the wood flooring as she used them to thrust herself harder on her husband's cumming shaft. Large horns had sprouted from her temples and her mouth was full of long, pointed fangs. Her hands and feet were clawed, easily able to draw blood. Lurid red eyes looked at her uninfected daughter, evil and lust boiling inside. "I can't wait to see what kind of a whore my little girl is now. Too bad her father won't be able to."

Tina looked down at the husk that used to be her father, struggling to keep from vomiting. What had been a relatively handsome older man was now a desiccated corpse, skin grey, muscles atrophied, bones in sharp relief. Phillip's face had withered and caved in on itself, his hair as grey as his skin. "Oh, here comes the last of him," Monica moaned, lifting herself up on her husband's cock, just enough for Tina to see the life fade from the thick red shaft. The color drained and the organ shriveled to nothing, crumbling into ash, the rest of the body quickly following.

Tina collapsed to the floor, sobs wracking her body, her mind overwhelmed with fear and grief. Her shuddering cries stopped when she felt a hand gently stroke her back.

"Don't worry baby, it's better this way. Your father was so tasty, and I know he enjoyed it. I mean, who wouldn't want to fuck me? Now come here, I can make it all go away. You won't have to think about it ever again. Just let me help you." Tina looked at her demonized mother with eyes heavy with tears. The corrupted woman hefted her heavy breasts, stroking the flesh until a bead of black milk appeared on the tip of her nipple. "Just one drink and you never have to think about it again." Another tear rolled down Tina's face, her broken heart rationalizing. There was nothing left, and she wasn't going to escape anyways. Her father was dead, and her mother and sister were both evil sluts. Escape sounded so good. Before she could second guess herself, she embraced her mother and began sucking on her tit.

"That's right baby, let it in. It'll take away everything that doesn't matter," Monica said as her daughter suckled her, stroking the girl's blonde hair. Her breast tingled with pleasure at being drained of its virus-filled milk. The spider demoness felt Tina shake in her arms, suddenly assaulted by an unwanted orgasm. The young woman only sucked harder on her mother.

"Aww, you already got to her," Jaydin said, coming around the table on shaky legs, dribbles of cum still running down her leg. "Where's dad?"

"I sucked him dry, just like your sister is trying to do to me. He tasted delicious too, I wish you could have had him," Monica said, checking out her daughter's new body. The petite succubus huffed a little.

"Me too. I wanted to get fucked by my daddy. Oh well, I'm sure I can find another daddy to cum in my little cunt. I bet all sorts of men would love to lose themselves to me now, I'm practically walking jailbait."

"And you look wonderful, sweetheart," Monica said, smiling at her transformed daughter with her fanged teeth. Jaydin returned the bright smile before crawling towards her remaining family members.

"Thanks, Mommy. You do too. I can't wait to see what this whore turns into too," the pale demon said, stroking Tina's hair as it lengthened and turned pink. "Going to have to try some of this too," she said, her mouth closing over her mother's other nipple, sucking out more of her mother's tainted fluid.

A few minutes and orgasms between the three women later, Monica's milk ran dry, forcing her daughters to relinquish her nipples. Jaydin smiled at her, but Tina just stared straight ahead with an empty expression, her body still trembling from time to time as her changes finished. She had gained the same perfect body as her mother, but without the more monstrous additions. Her skin was pink, a shade lighter than her hair and eyes. Her cunt constantly dribbled a stream of juices, ensuring she was always ready to be penetrated.

"How does that feel, darling? Better?" Monica asked the dazed succubus, who slowly looked at her mother.

"Yes Mommy, I feel a lot better. Please, can I go find a cock to fuck me? My cunny is so wet," she said, her words accompanied by a gush of fluid from her crotch. Jaydin laughed as she watched her changed sister.

"Looks like I got the body of a little slut and Tina got the mind of one. Come on sis, I'm sure we can find someone who wants a piece of that ass. Let your little sister take care of you."

"Okay sissy. I want a big one okay?" the childish Tina said, her eyes alight with a mixture of childlike innocence and rampant lust. Jaydin laughed and grabbed her sister's hand.

"Sure thing, whatever you want."