A fifty-year-old mother with a beautiful face and a ripe, voluptuous body was planning a hot spring trip with her boyfriend, who was thinking of remarrying. Her son, who was filled with jealousy and carnal desire, saw his fifty-year-old mother's happy and lustful appearance as she indulged in masturbation, wetting her ripe pussy, and wanted to monopolize his beloved mother. The fifty-year-old mother, who gained twisted joy and strong pleasure from her son's actions, took his erect penis into her ripe pussy and rejoiced in the forbidden encounter.