The story below is how I became a cuckold for the first time and probably for life.
My wife and I had been married about 10 years and have been through as many Christmases. We have no kids, live in a nice home, both work, and in general have a great life. We slept together non-stop and were open and kinky; willing to try just about everything there was to try. I had brought up the idea of maybe swinging earlier in the year, but she wanted none of it. It was fine for her to do everything kinky, as long as it was just the 2 of us. On the other hand, we were both a little submissive and I would switch and Dom her when she wanted it but she would never really switch and Domme me, even when I asked her. She said it felt weird and she didn't know what to do. Despite this, I didn't know too many people that get to have sex with their wife as much as I did or try everything else out, so I was happy and certainly not complaining.
Anyway, back to that Christmas day, we had a lazy day to start, with no kids, we open gifts in the afternoon and she hadn't put any of her gifts for me under the tree like she normally does which was a little odd, but not a big deal. Around 1 we started and she opened the gifts from me first and was generally happy. She then said her gift to me was a surprise and to sit down and enjoy. At this point, she got my curiosity up and I wasn't going to be surprised if it was something sexual. Well, she stood up and started to slowly dance and strip tease for me, which got me swelling from the start. She is 5-6, 140ish, blond, blue, c-cup, and shaved; not a model, but still hot. Once she was top less she stood me up and told me she had costumes for us to put on, but I couldn't see them until we were dressed, so she grabbed a blindfold and put it on me before slowly stripping me and rubbing her tits over my body while she did. I was now fully at attention for her! She started by putting me in tight shorts and sat me down in a dinning room chair she had brought in and put on socks before tying my ankles and arms to the chair.