We  were talking  about the kids this morning,  and SO says to me that I can't get mad at his daughter anymore. 

Is that so?  I can't get mad  at this disrespectful  little asshole barging into our room at 7am and making  noise  huh?  Well there's going to be a problem  bub because  I'm not going to tolerate  that shit.  He got soooo pissed when I turned around and said that unlike his kids,  our baby girl will be  taught manners.  Don't like that bub?  Well then quit being a Disney dad.  I feel no guilt whatsoever  telling him the issues I have with his kids acting the way they are.  But does he care?  Oh no.  I made it clear  though that if he's  going to do that,  I'll have nothing to do with either of them.  Not my responsibility anyway