The third installment of the series in which a mother who loves her son too much uses her voluptuous body to teach him about sex! Natsuko shows off her body in a loincloth to strengthen her son's lower body, even though he's old enough to have no interest in sex. She is so moved by her son's erection between her huge breasts and the loincloth that she gives him a blowjob and a 69 to milk his semen. She also carefully explains the female body while letting him touch her voluptuous body, and gives him a lesson in sex, guiding his penis into her pussy! There's plenty of radical loincloth sex education like this one!