After losing her husband in an accident, Satomi lived with her daughter. However, for the past two months, she had been living with her married daughter and son-in-law. While it was a joyous situation, hearing their nightly activities made her body heat up. Yet, having no partner to turn to, her days were filled with self-pleasure. One day, on her way back from shopping, Satomi urinated at the entrance. Seeing this, her son-in-law couldn't help but get an erection. 'It's, it's all your fault, Mother...'
