Affair with an older man

I need opinions ladies. This has been bothering me for a couple years. When I was 16 I worked for a company and one of the managers was probably aroun 28, married, with two daughters. He and I started to flirt and one day he kissed me when we were closing shop together. It lasted maybe two months of flirting touching kissing. Nothing further. Now that I am an adult and married, I can't imagine doing that with someone especially someone younger. But when I was 16 I didn't feel wrong I didn't know I was ruining a family. Now I feel guilty ? I guess I just need to know that this situation doesn't define me as an adult now?