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 there is no sex between the couple, and the frustrated wife masturbates, but her father-in-law watches and smirks. One day, a delivery man from her affair partner arrives 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 with his wife. He threatens to tell her husband, and the wife cannot refuse, opening her legs. Furthermore, she is raped at night by her father-in-law, who she hates, and is made to cum many times.