My job involves me going into my mum's place of work sporadically. Sometimes once in a week, sometimes several times. About 2 weeks ago, I was there speaking to a bloke who works there (on a professional level) when another guy came up to us ans said something along the lines of ''did you know Nancy is JaneCaroline's daughter''? Short conversation where I confirmed this and bloke 2 wanders off. All fine. Finished up with work stuff, went to the loo, pottered about etc. Went to leave. Bloke 2 comes up andoing asks if he offended me. I was slightly confused at this point until he elaborated that he was referring to the previous conversation. I said ''of course not'' and carried on my merry way. Thought nothing of it.
However. Since then every time I see him he apologises ando tells anyone nearby- his colleagues ando mine- that he has offended me and that I'm mad at him. It's started to make me feel really uncomfortable and other people have now mentioned it to me too.
I don't really know why he thinks he'said offended me or how to deal with it now 