Hold on, T. Your last line makes no sense. It's incorrect.
Always remember who "didn't" change. You acted to change. She chose not to. And it clearly us 100% about her. Completely self-centered.
Your sitch will likely be how mine plays out as well. The most important thing is that YOU will detach from the situation and be able to focus and you and your D's.
AND IT DOES MATTER. You didn't quit. You have to remember that. Your D's will.
I'm not Puppy, or Greek, or Allen or Coach. I'm just a dad like you living the worst case scenario. But the ring I proudly wear on my finger is MY commitment to my family. And WE come first. She makes the decision to leave. And if she does figure it out and it is too late (because you and your D's have moved on), SHE gets to think about that forever.