Tsuma no Haha Sayuri

The main character of hentai lives with his wife and her mother. One day, his wife suddenly leaves the house, leaving him alone with his mother-in-law. Shocked and upset by this news, the hero feels devastated. But then his mother-in-law, Sayuri, says: "I'll be in my daughter's place... Take me." This is how the story begins, full of the development of the relationship between the characters and the gradually emerging feeling of love.