Sorry to hear about the change in your sitch. You have my deepest sympathies.
You are a good man and need to remain as positive as possibly for your kids. It will be hard on them as well and they will look and take cues from you as to how to respond.
It stinks when they can't bring themselves to forgive or to let go of the anger, hurt and resentment. Try to remain an example of compassion for her, be a beacon. I often think of your words to me about compassion when dealing with my WW, particularly when talking about D. They have helped me tremendously and I hope you will remember them as well.
Grieve a bit more and then try to get some rest. Although it feels like the end of your world, you still have the rest of your life to live, so live it. Vaya con dios.
Me:44 W:38 T:10.5 M:7.5 D:3 BD: 7/2015 W moves out of MBR: 9/2015 WW files for D: 2/8/2016