I have name changed for this.
Roughly 7 years ago you lot helped me when my DH left me after 20 years. He was having an affair.
The other woman took it upon herself to be extremely hateful towards me. Stalked me via social media, terrorised myself and my family. She ended up with a criminal record and restraining order (2 years after the split)
She took great delight letting me know she had "won my man". I didn't even know we were having a competition 
He never paid me any child maintenance, left us destitute. He is self employed.
Well, he's done exactly the same to get. Left her with her kids for another woman, she had nothing. No money, no home, nothing. Now she wants to befriend me and go after him for his money. Is this woman insane?
Well anyway, aibu if I literally don't give a shit and don't feel sorry for her one bit?