The son's wife, who came to stay at his parents' house, is taking a bath. The father-in-law can't help but peek and is excited by her well-proportioned body. After the bath, the wife makes an inviting motion, asking, "Father-in-law, shall I wash your back?" She drops the bath towel and her erotic body is burned into his eyes. The father-in-law sneaks into the room where the son and wife are staying and instinctively grabs the son's wife's buttocks. The wife is nervous that her husband might wake up, but she can't hide her excitement. The father-in-law and wife hide in a room where no one comes, and share a hot and lewd kiss, saying, "Please take responsibility for my husband's sexlessness." The father-in-law devours the firm and elastic lewd big breasts and big buttocks. The natural explosion of the lewd wife's sexual desire drives her crazy. The father-in-law and wife are absorbed in sex like hot magma.