"Anyway, cut her some slack. She's lost her kid. If my husband had dumped me for a neighbor woman and then I lost my kids, I'd be bitter too."
She isn't bitter because she lost her kid and her husband dumped her.
Her husband dumped her and she lost her kid because she's a bitter, self-obsessed person.
She created her own mess. She deserves no slack. The only thing she deserves, from the looks of it, is to be alone for the rest of her life so she doesn't inflict herself on anyone else.
You have no way of knowing that; you can't know what she was like before the divorce. I don't know if this has ever happened to you--if you've ever been abandoned by a spouse--but most people go through a period of depression, anger, and bitterness after a divorce they didn't want. I've met both men and women who were filled with fury after such an event--it's quite normal. Nobody comes through it all sweetness-and-light. I hope she can get over it.
She created her own mess. She deserves no slack. The only thing she deserves, from the looks of it, is to be alone for the rest of her life so she doesn't inflict herself on anyone else.
How compassionate you are.