Stick it in already

"Hurry up and fuck me before the spell wears off," Carla said.
"I'm trying," Fred replied. Though it wasn't really him replying any more than it was his mom asking for it.
Both mother and son had been possessed by the school bullies. They were trapped in their own bodies, forced to experience everything the bullies made them do but powerless to stop themselves. That's why Carla found herself lying on her back on her son's bed, tits in her hand, leg spread as she begged Fred to fuck her.
Fred tried to fight, but was unable to stop himself from crawling up his mom's body and wrapping his hand around his own erect cock. "Eww," he said, "I'm touching his dick."
"Get over it and stick it in already," Carla found herself insisting.
Carla watched helplessly, her hands plucking at her enormous tits as her son pressed his cockhead up against her entrance. There was a brief pressure and then he slipped inside her, driving in to her wet heat all the way to the hilt.
Fred was disgusted to be inside his mom, even as his body quickened its pace, sliding in and out of Carla's wetness as an unwelcome pleasure wound itself through Fred's body. He drove faster and harder, clamping his lips around his mom's nipple as she moaned. Her body jiggled beneath him, their skin pressed together. He could feel everything: her tits, her tummy, her soaking wet pussy. He finally came in a pounding, rushing orgasm, filling his mom with his hot cum, grunting as he did so, hating what he was doing but unable to stop the bullies from doing it.

A young man clones his mind into the bodies of four women at an anime convention and uses them for his own ends in Cosplayed, available on Smashwords and Amazon. Preview here.