A married woman in her fifth year of marriage lives with her husband's father due to his frequent business trips leaving him absent most of the time, causing their relationship to suffer from unfulfilled desires. Despite trying to satisfy herself through masturbation, she can't help but feel embarrassed when her watchful father-in-law catches her in the act. One day, while waiting for her lover's delivery man, they end up having sex right under her father-in-law's nose. To make matters worse, he witnesses not only her masturbation sessions but also her infidelity. Feeling threatened by his knowledge, she reluctantly submits to his advances despite hating being intimate with someone she finds disgusting. Throughout the night, she is repeatedly penetrated against her will by the unwanted sexual predator that is now her own father-in-law.

結婚5年目の人妻は、夫の父親と同居している。多忙な夫は出張などで留守が多くて夫婦の営みもなく欲求不満の妻はオナニーをするが、その様子を除き見てニヤける義父。ある日、浮気相手の宅配業者が来てセックスしてしまうが、またもや覗いていた義父。そして、義父はオナニーや浮気現場を目撃した事をネタに嫁の体を求める。夫にバラすと脅され断りきれずに股間を開く嫁。更に、夜●いされ犯●れ大嫌いな義父に何度もイカされる。