Would you let your DH socialise with topless work colleague on beach?

[YehaaYessir]

So me and DH have recently moved to France for his work. He seems to be enjoying his work and the other day he messaged me to say he was going to the beach after work with some friends from work and asked if I wanted to come too.
When I got there there was only him and two girls and one of them was topless! I felt really uncomfortable as she wasn't just sunbathing either, she was getting up and walking around topless too, she was also speaking to my husband in French (which he speaks but I don't) which I found uncomfortable.
We had a massive row about it when we got home, he says I'm making a drama out of nothing and am being unreasonable.
So my question is, would you be happy if your DH was socialising with a topless attractive French girl ( (with big boobs for perspective if it matters).?

It's not ideal but then he did openly invite you when he could have kept on going alone, on the sly. Also, it's more of a cultural norm in France, I would say.

In terms of excluding you from the conversation, perhaps she can't speak English?

I don't sunbathe and so would not have gone with work colleagues to any beach, regardless of who was wearing what. I enjoy a regular sauna but not with work colleagues. Most of my recent visits to the south of France have been for art exhibitions or the Cannes film festival.

I doubt the woman concerned was sunbathing or indeed walking around topless with any intentions, just finding it more comfortable herself.