Has anyone ever recovered from a sitch this bad?

[antlers]

Relationships work best when they are based on mutual feelings of love, respect and kindness. The kids and their well being are not a priority with her.
Expect anything from anyone, the devil was once an angel.
Put your time and energy into investing in your own personal growth instead of investing in a relationship that she is ending.There is no return on the investment in the relationship that she is ending. In contrast, the greatest possible return comes from investment in you.
The only thing you can do anything about right now is yourself. I know it hurts and I'm sorry you're having to go through this.