"What are you doing?" Saki was confused when her son Yuta approached her. Yuta had peeked at Saki masturbating and was excited. He said he would comfort her if she was lonely. That couldn't be allowed. As a mother, Saki tried to stop Yuta's rampage. However, her body, in extreme frustration, responded to his passionate caresses... A mother's reason? A woman's instinct? Saki's Kokoro was torn between the two.