Yumiko lives with her husband and son. Her college student son is busy with part-time jobs, which makes her worry about his studies and health. One day, Yumiko was caught by her son while she was masturbating in the kitchen. The son became aroused at the sight of his mother's lewd behavior. A few days later, when Yumiko was taking a nap in the living room, her son came home. Seeing his mother's panties, he became excited and masturbated next to her while she slept, ejaculating in the process. Yumiko noticed this. 'You should do such things with women other than your mother,' she scolded, but he replied, 'I can't hold back after seeing Mom's perverted masturbation!' and pushed her down...
