To answer your last question, yes, he most certainly is! It's funny, they want to get rid of you, but somehow, want you to still be there for them.
Whilst I realise that it'll be difficult for your kids, I would tell them now. It sometimes help the WAS realise the damage they are inflicting(prepares to be shot down in flames!).
M 45 W 52 SD22 S9 D8 BD 6 April 2015 Not living together 4 Dec 2015