[MM] I had anal sex with my wife’s brother

My brother in-law was in town for the weekend and was staying with my wife and i. There has always been a connection between us but I thought it was just because we were close growing up.
After dinner we had a long conversation at the dining table and while my wife was talking about her work and I felt a leg brushing up and down my foot. I assumed it was my wife and smiled at her but then my brother in-law coughed and I looked over at him and he nodded to under the table and continued to rub. I instantly got an erection and could not hide it, my face went red. Through the conversation he slipped his hand on my thigh without my wife noticing and I almost reached orgasm after 5 minutes.
After our conversation we decided to clean up and head to bed. He pulled me aside and told me has been fantasizing about having anal sex with me all night. I knew this was going to come up near the end of the night but was still shocked!
We agreed on a time to make sure the wife was asleep. When the time came I looked over and she was sound asleep. I met up with him and we stripped our clothes off right away, we breathing heavily, and sweat sweat sweat!!!
He bottomed and it lasted about 8 minutes, I have never orgasmed that strong in my life. I came inside of his asshole and pulled out and then dribbled on his back. He told me to wipe it off and feed it to him and so I did. It was the best feeling in my life. I sucked him off after this and he finished on my face, I licked it up because he did that with me but it didn’t taste good. We spooned for about an hour then I went back into my bed.
I’m writing this the next morning so it happened last night. My wife and brother in-law haven’t woken up. Don’t know what will happen. Wish me luck!