A married woman in her third year of marriage lives with her husband's father. Her busy husband is often away on business trips, so the wife has no sexual relations with him and masturbates, but her father-in-law watches and smirks. One day, a delivery man from her affair partner comes and they have sex, but her father-in-law is watching again. Then, the father-in-law uses the fact that he witnessed her masturbating and cheating as an excuse to demand sex from his wife. He threatens to tell his son and the wife can't refuse, so she opens her legs, but they are wet. He then visits her at night and makes her cum over and over again, even though she hates him.