[ENGLISH-SUBTITLE] GG-189 Mama’s Real Sex Education Nanako Mori GG-189. Nanako living with her son. One day Nanako is forced to have a relationship by a man and unwillingly forgive her body. During the act, the son who came home is surprised to see his mother. The boy sees sex and tells Nanako that he has an erection and asks him to teach her the body of a woman. Although troubled, Nanako decides to accept her son as part of her sex education.