OP here-- am a man, by the way. Got looped into this problem because some male friends of mine keep receiving antagonistic messages from the woman at odd hours of the night.
As far as the woman telling the truth, she is not. Whether this is because her perception of reality is profoundly distorted but sincere, or because she is genuinely delusional, or even just plain wicked, is quite difficult to tell.
The problem is not merely that she is not telling the truth, but that she enflames serious drama with untruths. If she were just some casual teller of tales for the sake of entertainment or jocoseness, there would be no issue. She makes claims about how other people are treating her, and her family, which are demonstrably false and then accelerates in demanding justice when people do not admit to the lies.
The family has attended our church off and on for a few years. Any time they are "off" it is because of some drama like I've described. Then eventually they come back, things seem ok for a bit, then the drama re-asserts itself.