@coffeepine @selzero I helped a friend get married by doing a lot of pre-wedding work. This meant being in the company of his intended for five weeks.
She. Was. Appalling. Multiple Personality* was the excuse for sure, but as my friends secondary said: It doesn't matter if ALL your personalities are assholes. (But she didn't use "assholes," which was interesting from an American at the time...)
*The problem for me was he hadn't actually WARNED me. He told me AFTER I'd been there 3 days...