The son-in-law's mother-in-law Maiko's huge breasts make him have lustful thoughts. One day, he finds a photo of Maiko on a dating site. With the perfect opportunity, he immediately confronts Maiko and pressures her into a relationship. He forces her to masturbate in the bathroom, gives her a blowjob in secret from the family, and has sex with her against her will... Unable to resist, Maiko becomes his son-in-law's sex toy...