The stepmother encourages her to play sports with her and fuck her

This boy does not like to do anything sport and is lying all day at home watching life go by. Her stepmother is worried, so since she loves to exercise, she looks for a way to convince him to encourage him too. The method he has to use is a bit drastic, because at one point he starts sucking his cock. He tells her that it's okay, that if he doesn't want to exercise in the normal way, he's going to have to fuck her hard and hard to at least burn a few calories while he's getting his cock.