A voluptuous married woman lives with her husband's father. Her busy husband is often away on business trips, and the wife has no sexual relations with him, so she 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 ask for his wife's body. He threatens to tell her husband, and she can't refuse and opens her legs. Furthermore, the wife is raped at night by her father-in-law, who she hates, and is made to cum many times.