I (f25) have a coworker (m50) that I am close with. We both worked at the same university and have a lot of the same friends, and at our new job, we hate the same people. We are "close" but we don't hangout outside of work, we don't contact each other after hours, I ask about him wife and kids at least once a week (if he doesn't bring them up first), etc. We don't flirt, just vent.
Today, a lady came up to me asking for a favor. She told me to stop following him around and that everyone could see what was going on and I knew it too. I was shocked because I had no idea who she was. But then it clicked and I couldn't say anything except that I was sorry.
What do I do now? Should I report it to hr or just leave it alone?