MWG, I agree that you should NOT be the "rescuer" if your H is kicked out.
I think that when they come back because they HAVE to it does not require them to do the necessary work to have a healthy R. Leave the unhealthy person to the OW. You want the healthy person.
My heart aches for your Ds. I know what it is like to feel that your children will have permanent scars from the whole situation.
M: 16 years Bomb 4/07 OW 20s long gone Divorced 11/09 I remarried New Guy Cooperative r w/X regarding D