[JUQ-725] - 5 months of newlyweds, I conceived my wife's sister before my wife ... Satsuki Fumino

I think it's time to have a child... My life became stable, and one day, when my wife and I were working hard to make a child every night, my wife's sister, Mr./Ms., decided to stay at our house for five days. If you care... I continued to work with the couple, but it seemed that my voice was leaking, and Mr./Ms. Fumino seemed to be unable to sleep. Then we became aware of each other, and we started to have a relationship without my wife's knowledge. Gradually, the number of times increased, and all the sperm for making children with my wife was used for my wife's sister, Mr./Ms. Fumino.