Yukari, who thought she had always had a stronger sexual desire than most people, had always been dissatisfied with her husband's sexual relations. Recently, however, it had gotten worse, and he would say things like, "I'm tired," and the number of times they had sex had only decreased. Yukari was at her wit's end. One day, when she happened to peek into her son's room, she saw her son clutching his red-hot penis and stroking it up and down. She wondered who it resembled, but the penis was so magnificent that Yukari's pussy began to ooze juice...