I can't get over wife's sneaky kiss from years ago

Dear Coleen I've been with my wife for 30 years and she's now 54 and I'm 55.

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We were obviously young when we met, but it was love at first sight, at least for me, and we've built a very happy life together, which includes a wonderful daughter.

But something has been nagging at me to the point where I've started therapy to try to deal with it.

A few months ago, my wife admitted that when we were first dating, she developed a crush on a slightly older guy who she was working with.

They kissed and did other things on several occasions, but didn't get to the point of having full sex.

She says it was a short-lived thing and it made her realise she was committed to me. He left to take up another job and that was that.