The elderly father-in-law had lustful feelings for his son's wife. One day, his carnal desires explode and he starts licking his wife's ass and genitals. The wife has only known her husband, and becomes addicted to her father-in-law's seasoned tongue. The daughter-in-law begins to masturbate while thinking of her elderly father-in-law, but eventually she can no longer bear it and overlaps with her elderly father-in-law, who is sleeping in the next room, and they fall into a forbidden relationship.