With her husband's overseas business trip extending, the wife's sexual frustration reaches a peak. Her sexual stress is directed towards her father-in-law, for whom she is caring. Even when changing her father-in-law's diaper after he wets himself, the wife becomes abnormally aroused and ends up having sex with him! The father-in-law is also seduced by his daughter-in-law, played by Reona Kanzaki, who has a big butt and a cute face, and his energetic erection, which is hard to believe for an elderly man who is caring for him, fully satisfies his daughter-in-law's sexual desire. Pay attention to Reona Kanzaki's big butt as it arouses the older man's lower body!