Miyamura Nanako, a father-in-law who cuckolds his son's wife with fantasies

My stepfather falls in love with Nanako, the wife of a son who should never be interested in him. Nanako has a lovely smile and her slender body is attractive. Even though he knows it's no good, he fantasizes about his son's wife's perverted appearance. My wife masturbates as if to show off, my wife gently gives me a blowjob in the bath, and my father-in-law's fantasies continue to grow...