Last I checked, women don't belong to anyone. Nobody knows what happened with Barkley and the aforementioned girl just yet. But, she can make her own decisions. It's not Ross's fault that he talked to someone who somebody else claims ownership of. Now, if he was friends with the guy, this is perhaps a different story (violating friendship norms). But, what it looks like is that some assclowns were up in arms over the fact that one of "their birds" was taken with Barkley and one of them took it out on him. Either way, this should, first, be cause for a conversation between the two partners and, second, an occasion for the guy claiming possession to look inward and see what a pud he is.