Deme and I have an open relationship. There are rules about it though. In this case it is we can not just go out and have sex. It must be discussed between us before it happens with some one else. We agreed that this is reasonable.
While we were staying in Jacksonville, Deme had met up with a young woman about her age who was also married. They were becoming friends and we had met them fro dinner a time or two. We had not even though about having sex with this couple yet as we were just getting to know them. Deme was over at their apartment when her friend had gone out for some pizza. The husband at the time was able to take Deme in to the bathroom and have sex with her on the counter.
I get home from work and Deme is very needy. She needed to be around me all after noon and then wanted me to clean her in the shower. While in the shower she broke down and let me know she had sex with her friends husband with out talking to me about it first and then she cried a little bit. After she was done she took me in to the bedroom and asked me to fuck her in the ass. We had discussed doing this before but she just was not ready to try it until now. I thin she may have wanted me to do it as a form of punishment for her transgression as I reflect on that night.
We had some lube on hand that she uses for her toys and we used that. We lube her tight ass and then me. The first penetration was a bit difficult as she tightened up as she felt me come in for the first time. After few shallow and slow strokes she relaxed some as I was able to go deeper and a bit faster. It was not long before she was getting in to it and I could go all the way in and a mild but steady pace. We continued this pace for awhile as she built up to her first anal orgasm. When she finally released herself, she broke down and cried and apologized profusely for what she had done. Since then we have had many anal adventures.