If you ask her why the sudden change, she'll get defensive and attack you. SHE DOESN'T KNOW WHY. She just feels it. It might be an OM. It might be a MLC. It might be just realizing that she's lonely.
It doesn't matter really, once you've ruled out an OM. All you can do is GAL, 180s, and let her go. If there's an OM, your plan of action is much different.
