The son wishes to have sex with his mother in front of his father, but of course, she refuses. One day, at the son's command, Sachiko drugs her husband. Unwillingly obeying her son's command, Sachiko is raped in front of her unconscious husband. When her son's hand reaches into her underwear and his penis scratches around her vagina, her reason flies away, and she accepts her son's penis. Even after her son finishes, she herself asks for his penis again, and with a stronger and larger penis than her husband's, she ascends to heaven many times.