Is it ok to wear revealing bathing suits around familv?

Hi, so this is my second time posting something about this situation and I wanted to get a different perspective from new people on this, since it happened again...

I (f45) went to a beach with my son (m23) and spent the day together. We are on vacation together. Anyways, we were having a nice relaxing time having drinks and laying in the sun. Until this older man around maybe 70 years old I want to say, came up to me and at first he was making innocent conversation with me and my son.

Then he made a comment about my bathing suit and how it's "inappropriate" and that I should not wear such a revealing bikini around my kid and that I should "set an example" whatever that means.

For reference, I was wearing a two piece. The bottoms were Brazilian/thong and a regular bikini tube top. I honestly don't having a problem wearing "revealing" bikinis as such around my son. I've done it ever since he was little and me personally I don't see a problem with it. I like to get as small of a tan line I can get. Hence the bikini.

But I'd like to know how other people or women specifically feel about this. Do you agree with the old man?