Mio is a married woman with an exquisite body. Frustrated, she makes the mistake of having an affair at home, and to make matters worse, her elderly father-in-law witnesses it! From then on, Mio's days of "special care" for her father-in-law begin. "If you don't want your son to know..." he says, playing with Mio's lewd breasts and licking her fine skin like a horny monkey. He even makes her chew her food naked, enjoying the taste of Mio's tongue. Then he inserts his dick, the only thing that's still vital in her bedridden old body... With no way to escape, Mio is violated by the old man every day, and eventually she even wants to have an affair with her father-in-law...