If you are out on a date with a woman, do you expect her exclusive attention?

I would be friendly and perhaps invite him to sit down for a minute. Perhaps a friend of mine might come by as well. The same situation might exist the other way. Also, if I were the friend wandering by the dinner table, I would have Shortt friendly conversation and then Politely Move on, around them their privacy

You'd have to be reasonable. You don't own that woman. She has a right to speak to other people.

I tell her she's not allowed to talk to other men and I make scene. Obviously.

That would be fine, even better if she introduced us.

Yes and she would get mine