息子夫婦と同居している父親。病気で入院していたが退院して自宅療養になり嫁が介護をしている。ある日、父親が寝ている横で嫁の体を求めて口で処理をさせる夫。しかし、義父は起きていて横目で見ていた。更に、宅配便の男と不倫セックスする現場も義父は覗いていた。以前から爆乳嫁の事を女として見ていた義父は、不倫現場を見ていた事を嫁に話して、自分も同じ事をしたいと懇願。戸惑う嫁だが、徐々に股間を開き感じていって・・

A father lives with his son and daughter-in-law. He was hospitalized for an illness but has been discharged and is recovering at home, with his daughter-in-law taking care of him. One day, while his father is sleeping beside him, the husband asks his daughter-in-law for oral sex. However, the father-in-law is awake and watches out of the corner of his eye. Furthermore, the father-in-law also witnesses his daughter-in-law having an affair with a delivery man. The father-in-law, who had long seen his busty daughter-in-law as a woman, tells her that he saw the affair and begs her to do the same to him. The daughter-in-law is hesitant, but gradually opens her legs and begins to feel pleasure…