Very sorry. If it has come to this point, with no other recourse, than as hard as it is, focus on your kids, and yourself. You will get through this, it will be a life changer. BUT there is light at the end of the tunnel.
The kids, will understand if both of you stay unwavering in their support. FWIW, I get along with my ex better today. I know this will be of little value, but hang in there, it does get better.
Prayers will continue for you and your children. Please never hesitate to contact any of us.
Take Care,
tw