If he's going to blow up your marriage, then he gets to develop his own relationship with his kids. Running interference and helping him out just puts all of the burden on] you.
I know. I know. I just feel soooo bad for the guy. He has only seen the kids 3 times since 10/26 and hasn't seen or spoken to them at all since 11/21. Something has got to give here!! I'm starting to feel like I need to start making the kids go visit and call.