Sabrina shook her head, sweat trickling down her brow. That... THING had Betty's shape, but it wasn't her. It couldn't be! She watched, helpless, as Cheryl's squeals of terror turned into moans of lust. Her widened eyes began to flutter and droop as she gyrated against the succubus, coaxing more of the demonic cock to thrust into her and sucking fervently on the demon's tail.

"B-by the name of Solomon, I displace thee," Sabrina blurted out, gesturing mystically. "Return to thy plane of origin!"

The magic whirled around Betty's writhing form but did nothing. The succubus laughed with Betty's voice.

"Silly witch," she giggled. "It never occured to you that I WAS Betty?" She waved a hand dismissively. Suddenly bands of force clamped over Sabrina's hands, feet and mouth. "That should hold you while I finish with my lovely treat here."

Betty redoubled her efforts, pounding her thick demonic member into Cheryl's now-accepting pussy. The redhead arched her back and grunted, practically swallowing Betty's tail as she orgasmed.

Sabrina could not look away. Betty had become unearthly beautiful with her new demonic traits, and the teenage witch could feel her panties dampen at the sight of her sweaty, muscular form. Betty looked up and licked her lips, her eyes meeting Sabrina's.

"Such spirit you possess, little witch," Betty purred as she climbed off the practically-comatose redhead. "Even now that I am glutted on this slut's orgasm, you resist my influence. This one could aspire to becoming my slave, but I have a better role in mind for you."

With that, Betty pounced on Sabrina, breaking the magical bonds. Their lips met and Betty forced her tongue into Sabrina's mouth, along with something else: Sabrina could feel black tendrils of corruption infusing her.