Her husband quit his job and drank every day. After returning from her part-time job, Ryoko cleaned the house. Seeing Ryoko's ass, her husband pushed her down. Their son was watching. Unable to orgasm from the forced sex, Ryoko masturbated. Their son was watching that too. One day, as Ryoko masturbated in the kitchen, her son came and said, "I saw you fucking and masturbating. I can't hold back anymore," and pushed her down. From that day forward, Ryoko and her son began their forbidden secret affair, hidden from her husband.