Its interesting in reading all these posts on the was behavior. Its as if when they leave for someone else, life is supposed to be as it was, all sugar plums and lolipops. They don't go through the left behind, all alone stage. They move right into fantasy land and expect it all to be just great. When your behavior is different or doesn't fit into the lolipop plan, sort of sets them off.
My rec, and of course I'm no expert, but I'd let her keep trying to setup this 'talk' and you just keep doing what your doing. What would a 'talk' do to help you out if she's living with OM? I'd ignore her as long as that is the case.