It was my wife's 20 year reunion, (we went to the same school, but she was 3 years behind me), so we flew in to town for it. 

Michelle, my wife, got in touch with a group of people she knew back then and we split the price of a time share. One other couple and two single guys that were in Michelle's grade. 

The couple I didn't remember at all, one guy, Rick I remember only vaguely, but the other guy Tony had attended our wedding and was one of the people in Michelle's circle of friends. She is still friends with him on Facebook.

The night of the reunion, Tony asked Michelle to take a spin with him on the dance floor for old times sake. They slow danced together, but in an appropriate manner. As soon as their dance was over, Michelle gave him a peck on the mouth and thanked him for the dance then immediately asked me to dance.

When Michelle and I were on the floor, she confessed that dancing with Tony was a bit awkward. I asked her why and she said you know why. I honestly did not know why and asked Michelle to remind me. Michelle said it's ancient history and I let it go, but it continued to eat at me.

That night when we got back to the time share, Michelle was laying in bed and I was climbing in to join her. I brought up again why she would feel awkward about dancing with Tony. Michelle insisted she had told me, but I am sure she did not.

Finally Michelle told me, Because we had a fling and I think he never got over it.

Just to clarify I asked Michelle, You had sex?

Michelle sheepishly said, Yes.

Apparently, when we had both graduated and I was in the military, I had come home on leave, Michelle wanted to get married, but I wasn't ready. Which I remember. I felt pushed, so I told her that maybe we needed to take a break.

Two days later we got back together and had made plans for a wedding when I got out the following year.

The night I had said we needed to take a break, Michelle went out with her friends and then went home with Tony.

Now I'm sure I would remember my wife telling me she had sex with another man, but she insists that she did.

So, I asked her just the one time? 

Michelle seeming annoyed said, Just with him.

How many times Michelle?

I don't remember, Michelle told me, Several times while you were stationed in Korea.

I asked, You told me about all of this?

No, not about the times you were in Korea, I didn't want to hurt you. But I told you I stayed at his house the night you broke up with me, none of this would've happened if you didn't break up with me that night and I never since we've been married. I was young and confused, but in the end I chose you because I love you and that's all that matters now.

Clearly Michelle had come to terms with this long ago, but I haven't. This has left me strangely jealous and more turned on by Michelle than I can remember.

There are more questions I want to ask, like why had she still invited him to our wedding, but she has made it clear that she is done talking about it.

Michelle to this day remains friends with Tony online and I know they still message each other occasionally. I know that nothing is going on, because they don't see each other in person any more. 

I am not sure how to feel about all of this.