Can somone please explain to me about the men in the background. Were they different men she was seeing or was it one man she was hiding from the rest of the world. If so, what was wrong with having a man...was it because they were lower class?
We can assume there were many men - from the time she was a teen-ager. Once she moved into her house in California, it was one particular man from then on - the one who was killed along with her by her husband.
But all these different men, were in fact "one man" - we can assume: physically, verbally abusive, uncaring, etc.. The type that would prompt Harry Dawe's assertion that "this one....is NO GOOD!". For Harry to get that angry we can assume, at the very least, that the man showed physical abuse to Maria at some point.
There was nothing wrong with having a man, but these men were all "beneath" Maria. She deserved much better, but somehow or other SHE didn't think so. And she was ashamed of that - her neeed to be "in the dirt", so she tended to keep the men "hidden".
------------------------------------- "What one man can do, another can do"
No, the implication at the party scene is that the "cousin" Bogart objects to is one of many she has on the side. The man killed with her is the count's chauffeur, not the "cousin" in California or the man she was dancing with at the gypsy camp.