Yuki, who lives with her son Hisashi after her husband's passing. One day, she notices her son's penis is abnormally erect. The stiff cock reminds her of her late husband, and she involuntarily lusts after it. Yuki decides to calm herself down using her own body. Hands, feet, breasts, and her proud ass... She makes him ejaculate with various parts of her body, but Hisashi's penis shows no sign of wilting. Before long, Yuki resolves to use her own pussy for her son's first time…
