My spouse's ex wife is known around town (no, not making this up) for being a bully to her two ex-husbands, their new spouses/GFs/dates and to her own children (oh, the stories). I don't know her, tried to never interact with her, but everywhere I go, everyone just comes out and tells me how psycho she is. My spouse has confirmed that she is bipolar and I have seen texts that go from abusive to "oh, I'm sorry, did I hurt your feelings", then back to "you and your GF are [...]".