They tried to have a baby, but they couldn't get pregnant, and after a test, they found out that their daughter was infertile. A sad reality was thrust upon the daughter and her husband, who had been doing well. After much deliberation, the daughter and her husband came to a certain conclusion. One night, the daughter and her husband looked at their mother Mio with solemn expressions. In her hand was a diagnosis of infertility. Mio was flustered by the suddenness of the situation, and her daughter said to her, "Please give birth to my child." Mio had no choice but to nod and say she understood, not wanting to see the sad face of her beloved daughter. A few days later, she checked Mio's possible pregnancy dates, and finally that day arrived. Mio had sex with her son-in-law for the first and second time. Several months passed, but there was no sign of it. The son-in-law suddenly had an idea and told Mio to leave him alone, and suggested that Mio try to do it in a way that felt good for both of them, and the two of them overlapped their bodies as their carnal desires dictated. A few months later. It turns out that Mio is pregnant.