A housewife married for three years lives with her husband's father. Her husband is often away on business trips, leaving her sexually frustrated. She resorts to masturbation, but her father-in-law secretly watches her with a smirk. One day, she has sex with a delivery man who is her affair partner, but the father-in-law is spying on them again. Using the fact that he witnessed her masturbating and cheating as blackmail, the father-in-law demands her voluptuous body. Threatened that he will tell his son, she is unable to refuse and opens her legs for him. Furthermore, he sneaks into her room at night, forcing her to climax repeatedly under the touch of the father-in-law she hates.
