Kana and her husband are still close, and they have a lot of nighttime activities for their age. However, recently, her husband has become weak, and Kana has become a little frustrated. Her son was watching the two of them, and he knew that his father had become weak and that his mother was frustrated. One day, when her son came home from work, Kana was sleeping in the living room with her breasts exposed. He couldn't help but approach her, and he massaged her breasts and played with her crotch. Kana woke up and scolded her son. However, she was overpowered by her son, who couldn't stand it anymore. From that day on, Kana, who couldn't be satisfied with her husband and a vibrator, accepted her son...