You can't do anything else but what you're doing, putting one foot in front of the other. You are fighting like a lioness for your family. Your WH doesn't deserve you one bit, so fight for your children, swallow that pain and take another step. You are doing everything you should be doing. Your reward will be this knowledge that you are doing everything humanely possible and I hope your children know one day how much you held it together for them.
Wise, wise words.
There are moments in this life when you are so confident in the rightness of your actions, that not even for a second do you consider the option that you might be wrong.