Quote: All this at the expense of her kids who she just doesn't see as hurting from this.
This is truly part of the midlife crisis. My H doesn't think what he is doing is hurting our children either because they are older. However, he avoids spending much time with them. My theory he know that it is hurting them and if he spends much time with them, he will have to face how much they are hurt. Hang in there and continue to do the right thing.
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.