DLDSS-313 A married woman runner with a big ass shakes her legs and buttocks to strengthen them with slow squats in a cowgirl position. Yuko Ono

Yuko has become addicted to running and has started going to the gym to improve her running ability. Her big breasts and big ass, which cannot be hidden by her sportswear, dance and shake, and sweat containing female pheromones bursts out. The trainer is excited and suggests the most effective training to improve her running ability, which is "sexual slow squats." This is the start of Yuko's personal sex training with her trainer!