A father-in-law who fell in love with his son's wife, Miina, whom he absolutely shouldn't be interested in. Miina-san has a lovely smile and attractive big breasts. Even though he knows it's wrong, he can't help but fantasize about his son's wife's lewd figure. A wife who masturbates as if showing off, a wife who gently gives him a blowjob in the bath, and the father-in-law's fantasies keep swelling...