Cousin's Wedding

About a month after we got married, my wife's cousin got married. His wife's family came to the wedding and the bride's brother who was a groomsman walked down the church aisle with my wife who was a bridesmaid. Later at the reception, he asked my wife to dance. After the dance, my wife told me that the brother of the bride told her that he wanted to fuck her. He wanted them to leave the reception and find a place to fuck. My wife suggested that he and his wife come to our hotel room after the reception and spend the night with us.
He was reluctant to bring his wife since he didn't want me to fuck her. My wife told him that the only way he would fuck her was if I also fucked his wife. He agreed because he was desperate to fuck my wife.
We had two queen beds in our hotel room, and we all undressed and got on the beds with each other's spouses. Soon I was fucking his wife and after I came in her, I noticed that he couldn't get an erection. He was so upset that I was fucking his wife that he couldn't get it up. He told his wife to get dressed and they quickly left.
The next time that we saw them was a couple of years later. They had a very cute daughter that was about 15 months old. Her mother told me that she was my daughter, and her husband knew since they had found out that he was sterile.
He asked me if I would impregnate his wife again and I did. Imagine what he felt since he never fucked my wife and I fucked and impregnated his wife twice!