Yuriko, a female teacher, has reached the third anniversary of her husband's death. Kazuki, the son-in-law of her daughter and son-in-law, is staying at her parents' house for a few days, and Yuriko has always hidden her feminine lust. Yuriko's subconscious, which was an extraordinary sexual fetish when her husband was alive, runs wild. She seduces Kazuki with a melting blowjob, close contact in missionary position, hip shaking in cowgirl position, and continuous orgasms. She becomes addicted to the pleasure of her son's pistoning into her mother-in-law's uterus...