I was on a business trip and couldn't get a hotel, so I decided to stay at my son and his wife's house. My son's daughter-in-law, Miyabi, has a nice smile, is tall, has large breasts, and is very erotic. Even though he knows it's wrong, he can't help but fantasize about his son's wife in a dirty way. She masturbates to show off, she gives him a blowjob in the bath, and her father-in-law's fantasies grow and grow...