She did it!!!

After about 18 months of dropping hints and asking my wife (Julie) said yes she would be happy to meet another man to have some fun with.
On the evening we arranged a child minder for our 2 children, Julie got dolled up and even at 39 she looked very sexy. She had a very revealing top with her tits almost poping out, short skirt and red stockings and heels. When I saw her I knew that my fantasy was about to happen within in the next few hours. She went to a local night club, after a hour a so she texted to say she had met James age 24 and she was coming home with him. 20 minutes later the door opened and I could hear them to in to the lounge. I thought I would give them some time alone to get relaxed etc. After about 15 minutes Julie calls me to come down and meet her new friend James, when I get into the room she was only wearing her knickers, stockings and heels. He was sucking on her tits. She said I am ok. I said yes do it. James then pulled her knickers off, part of me thought she would cover her pussy with her hands but she just opened her legs further apart. I knew then that even if I wanted to stop it it was too late. I led next to my wife holding her hand as he began to enter his thick cock into her. As he started to fuck her I suddenly remember she is not on the pill and he was not wearing a condom. The fact she could get pregnant by a stranger turned me on and I said nothing and just let him fuck her.
After he cummed I went back upstairs to let them have some fun on their own.
We both enjoyed her getting laid by a stranger and plan to do again.