This role-play is performed by adults. My son's girlfriend, Chanyota, is a muscular girl who loves martial arts and met my son at the gym. He and his son are a couple with an uneven appearance, but he has a muscle fetish and was attracted to his son's slender muscular body and kindness. The two of them are sweating and working out in the room today, but Chanyota, who is lustful for the sweat and muscles, gets horny...