Nao and I are not really parent and child. Nao was the stepchild of her remarried partner. A few years after he remarried, his wife passed away and he raised Nao by himself. A few years later, Nao, who had become a working adult, said he had someone he wanted to introduce, and brought his fiancée with him. At that moment, I realized that I was in love with Nao and was jealous of the two of them. Then, one night when he started living with the married couple, he witnessed the couple's activities. I am filled with anger and sexual desire at my husband who treats Nao roughly without even giving her cunnilingus...