An Imp

You watch, in sadistic joy, as Heather's feet transform into cloven hooves, her head grows as pair of short horns that point straight up and only stop about half a foot over her head, her entire body shifts to a deep indigo color, and her breasts actually expand to a pair of H-Cups. But through all that, she didn't change height one bit, although her body did take on a more toned and fit figure during the transition. Heather's eyes flashed open, revealing her eyes had changed to a more demonic green, and her pupils had literally changed into a heart formation. Her lips changed to a deep umbra color and got more than a little pouty in a naturally neutral state. She stretched and yawned, revealing her sharp demonic teeth and forked impish tongue.

"That was the best fuck of my life," she said with a new seductively impish tone with a demonic weight behind. "Of course, it's only the second fuck of my life, the first one was that girl from the basketball team that was bi-curious my frosh year of college. So boss," Heather said as she turned her attention to you, "what is next on the agenda? ****? Mayhem? Arson? More sex? You call the shots."

"Oh, I like where this is going," said Becky, "imps don't have to fuck someone to transform them into their kind."

"Yeah, but we prefer it," said Heather, "it's more fun for us that way. But I'm gonna need a few more imps to really start doing some stuff to fuck with people."