Yuriko witnessed her son masturbating. - Yuriko, who can't get her grown son's erect dick out of her head, starts masturbating in her bedroom. - My son feels something strange about the noise in the bedroom and quietly looks into the room. - The son also witnesses his mother masturbating. - A mother accepts her son who says, ``I can't take it anymore,'' ``just once.'' - The son, who can't handle it just once, begs for anal sex, saying, ``It's good here,'' and the mother accepts him as well.