Secret kissing affair between a father-in-law and his wife

Worried about Tooru's sudden slippage, Mako comes to her parents' house with her husband, Nobuo. My husband decided to go home for work, but when Toru saw him seem lonely, Mako decided to stay. At night, Mako drinks a drink she's not used to when she's in her stepfather's drinking time, and falls asleep drunk. When Toru saw Mako's thick lips, he became aroused and took her lips away. The next day, Mako meets Toru in a cheerful manner, knowing nothing. However, Toru, who can't forget last night, wants Mako's lips, her plump breasts and pussy...