My daughter-in-law's butt is so plump that it's unbearable. My father-in-law sexually harasses her to his heart's content while my son is away. The dissatisfied daughter-in-law reacts subtly, but the strong-willed daughter-in-law doesn't easily go along with my father-in-law's wishes. So, she asks a friend who is a masseur to give her an erotic massage that teases her crotch, and she can't hold back and asks him to thrust his dick inside her. Using that as a pretext, my father-in-law secretly gives my son's wife's body to him.