He fucks his stepsister with a friend.

The girl is naked in the bathtub and her stepbrother breaks into the bathroom to pee and then the girl tells him about her problems crying. The boy comforts her, but touching her skin and seeing her naked makes her very horny, so they end up fucking in the living room with a friend of the boy, where the girl gives the two cocks a blow job and then they fuck her, even making a double penetration pulling out shouts of pleasure.