NACR-285 Mayumi Shinono, a fifty mother who seduces her son

A forbidden love story between Mayumi, a mother who is treated like a servant by her husband, and her son, who feels pity for such a mother. My son's marriage is decided, and Mayumi clasps her son's underwear and masturbates so as to distract her lonely feelings. On the very day that her son leaves home to live with his fiancé, Mayumi's mother can't help but take action ...