結婚3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豊満な嫁の肉体を求める。息子に話すと言われ、断れずに股間を開く。更に、夜●いされて大嫌いな義父に何度もイカされる。

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 is frustrated and doesn't have sex with him, and she masturbates, but her father-in-law watches her and smirks. One day, her lover, a delivery man, comes over and they have sex, but her father-in-law is watching them again. Then, the father-in-law uses what he saw of her masturbating and cheating as leverage to demand sex from his voluptuous daughter-in-law. He threatens to tell his son, and she can't refuse, so she opens her legs. Furthermore, she is d at night and made to orgasm multiple times by her father-in-law, whom she hates.