For now just look at it as a way to rebuild your R. You have to have R because you have children. Think of it as what is best for your children.

Try to find post by Heart Felt One. He had a similiar situation with his WAW. As far as I know they reconciled and have worked things out. It might help to guide you.

Everything happens for a reason, maybe Dad needs to find that it isn't better out there, he needs to realize how good he had it here. Maybe he will find God and that is the most important thing when he finds Him he will know he is supposed to come home.