He fucks his step-sister's pussy and ass.

The stepsister finds him masturbating with the mother's panties and embarrasses him by confronting him. She feels compassion and apart she gets horny, so it helps him masturbate. Increasingly horny, she opens her legs and he fucks her pussy and then fucks her ass. She rides her cock with her pussy while he grabs her precious ass in front of her. She turns around and he fucks her pussy hard while she has an orgasm with her mother's panties in her mouth.