Rinka lives with her husband and father-in-law. Her father-in-law's dementia has worsened, making him unmanageable as he urinates all over the room. One day while caring for him, Rinka witnesses her father-in-law's penis standing erect and powerful. Unlike her husband who has ED, her elderly father-in-law's cock makes her can't help but touch it... However, since then, her father-in-law demands sexual services from Rinka at every opportunity! Oral sex is just the beginning; he makes her caress his smelly, unhygienic anus and finally mercilessly inserts his penis and ejaculates inside. Initially unwilling, Rinka gradually begins to feel pleasure from the affairs with her father-in-law...
