I started cheating on our wedding day with one of his best friends who happened to be a groomsman. It was totally unplanned but I had made plans with another man for the next day on our honeymoon. He and his wife were the owners of the B and B that we were going to stay at. They had really spent time while I was visiting the place a few months prior and the entire time before the wedding "grooming" me for an affair with them. There was absolutely no way I was going to be able to avoid sex with them after we arrived. I had no idea that he had caught his friend and I having sex and he didn't tell me for years. (He actually got a few grainy pics with a little instamatic camera from down the hall, there was no denying it). He also knew about several other incidents of my cheating. He just didn't say anything and let it go on. I did tell him (unfortunately after having sex with his friend) that I wasn't going to be a faithful wife with my body. He didn't reply but I took his silence as permission and never mentioned it or asked afterwards. I'm sure he probably thought it was just heated up sexual rhetoric but I meant it, and he soon found out.
Mrs Hotwife
As an aside, that wasn't the only cheating I had done on my wedding day. This, he doesn't know about until the moment he reads this confession. I'm going to have to relate the story but I'm not sure he'll be happy about it.