It's not a south or north issue. I think the consensus is it's the actions of a control freak not matter where she is. "Not allowed to bring a guest unless she is engaged, or soon to be engaged".... sheesh.
I also said long standing relationship, which negates taking last week's "hookup".
I wouldn't think so - but I don't know. I am no master of etiquite but my family and wife's family are definitely up on it.