Sheila gives in

The dark-skinned demon girl continued to pump into Sheila from behind. The new Broodmother screamed in delight as she was ravaged and used in the name of lust and corruption. She felt the hot seed of the demon girl's cock pouring into her, and felt that seed becoming more. Boiling and gurgling, she felt her new body swallow the seed, transform it, infuse it with something dark beyond comprehension. And most notably, she felt a connection to something, something so deep, and dark, and heart-stoppingly... evil. She sensed satisfaction radiating from it, a twisted, malevolent joy that made her mind sing. Whatever it was, she pledged to please it.

She came and screamed and laughed as another worm oozed out of her. Carly approached the broken woman, drinking in her new beauty, marveling at the perverse changes.

"Welcome, sister. How does it feel?"

"It - anh - it feels so- good!" Sheila's eyes rolled again. "There's something... someone. I- I need to - ah - please her!"

Carly wasn't quite sure what that meant, but she figured she would find out later. Now was the time for the next step.

"Sheila, your husband. He needs you right now. Can you help him?"

"Yes... yes! He needs to join me, join us! Use my babies, make him like us!"

"Yours aren't able to corrupt him yet, my dear, but we can use this one," Carly said, producing the massive glowing red worm. "What will you do once you have him?"

"I'm not sure... I w-" She was interrupted as a worm slipped between her lips, slime filling her mouth. It fell to the floor with a thud. Sheila's face twisted with a crooked smile. "I want him to breed me... to make more of these fucking worms!"

Carly smiled, too. It was predatory and filled with malice. The sickening lust she was indulging herself in was so wrong, it felt so good. She hoped that whatever horrible thing it was the worms desired of them, that she was making progress.

"Then take this. Put it inside his cock and watch him fall. Then, maybe he can turn your daughter, too."

Sheila looked up at Carly with an expression that changed rapidly from shock to lust to depravity. Every minute that she was like this, Sheila lost more and more of her humanity.

Jenny recognized the situation and pulled out of Sheila, though it took a lot of effort on her part. She noticed Carly was standing there watching Sheila approach her husband, and a thought struck her. Since they had been turned, she hadn't got the chance to fuck the gorgeous monster that had made it all happen. It was about time to return the favour for the gift she'd been given.

Jenny walked behind Carly and grabbed her by her full hips. She took a second to enjoy the smooth feel of her pulsing cock slipping between Carly's big, round ass-cheeks, then grunted at the sensation of spearing her demon sister's tainted asshole, reveling in the sensation that no normal girl's ass could ever provide. Carly just moaned lewdly, leaning back into Jenny as she kept her eyes glued on the scene in front of her.

Sheila had approached her husband, gotten to her knees in front of him. Carly's tentacles had left strategic openings, allowing Sheila to take off his pants, and she wasted no time in lining up the vile worm with his underwhelming cock.

"Come join me, babe. I can make you into the man you always wanted to be!" Sheila moaned.

Richard screamed around Carly's tentacle, but all that accomplished was pleasuring Carly as the vibrations enhanced her peaking lust. Jenny's cock slipped in and out of her ass perfectly, and she shivered anticipating feeling the euphoric high of night-black corrupting seed flooding her rancid insides.

Sheila placed the tentacle on her hands near the tip of Richard's cock. The creature squirmed, found its target, and began to slither inside, stretching him out to an impossible girth. Richard screamed even harder, while Sheila giggled with barely-contained lust. As it wormed its way into him, his screams slowly changed. By the time the worm had engorged Richard's cock, he was moaning, eyes rolling. His dick had grown massively, reaching nearly 11 inches, while he had begun the tell-tale physical transformation that marked him as a newly-born demon. When all was complete, Carly removed him from her tentacle's grasp. Richard looked like a hulking beast, rather than the spindly man he'd been before. He roared, an orgasm tearing through him, his massive new cock shooting jets of thick black cum onto Sheila's face, who squealed with delight and began to swallow as much as she could.

Jenny came, spewing dark cum into Carly's willing ass. Carly cried out and groaned, reveling in the feel of so much depravity occurring in and around her. Then, a voice came from the doorway.

"What the fuck!?"