A mother in her fifties was given a massage device by her son as a birthday present, and she was moved by her son's kindness and decided to use it right away. The moderate vibration causes the mother to have lewd fantasies and even masturbate by applying it to her breasts and crotch. The son, who has seen his mother's white, soft body trembling and ascending to heaven, loses himself in the voluptuous naked body in front of him and sucks on it. A 50-year-old mother enjoys the forbidden act with her son, making her big breasts and huge ass bounce lewdly.