I'm Not Your Mommy 3.

Gina is trying to work out but her stepson keeps bothering her. As long as he's there, she figures, he might as well help her stretch. Jennifer is tired of her lazy stepson and tries to motivate him to exercise by challenging him to a wrestling match where the winner gets whatever they want. Katie catches her stepson jerking his load intoher face cream. She finds that she's turned on by this behavior and wants more direct from the source. Spencer's stepson is a personal trainer but doesn't have much experience.