A busty, big-butt daughter-in-law, nearly dying from orgasm after being spied on during her affair and masturbation by her annoying, sexually harassing father-in-law, experiences unsatisfied sexual reactions and repeated climaxes. (Kimitsuka Hinata, KAM-172)

A voluptuous married woman lived with her husband's father. The busy husband was often away on business trips, resulting in a lack of sexual intimacy and leaving the wife sexually frustrated, resorting to masturbation. Her father-in-law secretly watched her and sneered. One day, the wife had sex with a deliveryman, but her father-in-law witnessed it again. He then used the pretext of witnessing her masturbation and infidelity to demand that she have sex with him. Threatened, the wife had no choice but to spread her legs. Even worse, she was repeatedly raped by her father-in-law at night, becoming his sex slave.