``What are you doing!'' Saki was confused when her son Yuta pressed her. Yuta peeks into Saki's masturbation and becomes excited. He said that if she was lonely, I would comfort her. That can't be allowed. As her mother, Saki tries to stop Yuta's rampage. However, her extremely frustrated body reacts to her passionate caress... Her mother's rationality? Is it a woman's instinct? Saki's heart sways between the two.
