I'll give you that it's private property and you can be asked to leave.  

But you can also ask why you're being asked to leave because that reason may give you a case for prejudiced civil suit which is why she didn't want to answer. 

The fact that after all of this she wants them to return is what is incredulous.  She invited them, kicked just the black half out and then requested he return?  Uh yeah ok... This isn't a private property issue it's clearly a social disconnect issue. 

She insulted the man and actually had the nerve to comment on his ability to speak well?  Why because he's black she's surprised he was able to conduct himself intelligently? It's those comments that make her look like an arse. 

The real point is being overlooked and that's the problem.