One of the first times my wife really flirted, danced and kissed another man happened while we were at a concert and involved a fair bit of alcohol. The next morning she was embarrassed about the way she had acted, but I kept reassuring her that it was all ok and as far as I was concerned she had not done anything wrong. I told her I loved her "fun" girl side. I still remember the way she looked at me and said "really, you do"? This was early in our marriage and she did not begin cuckolding me until many years later. Over the years I consistantly reassured her whenever she let her "fun girl" side come out to play. I suspect most wives are like mine and need lots of encouragement and reassurance to make them comfortable letting their "fun girl" side come out to play.
You sometimes have trouble believing how lucky you are to be married to such a beautiful woman -- a woman who (you well know) is desired by essentially every man who meets her. And you have trouble believing how lucky you are that your beautiful wife is about to cuckold you.
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I fucked him at the party when you were on your work trip. Everyone knows he fucked your wife.