Sleeper, My DD is balking at the idea of my new marriage, too. Perhaps some of it is that it's a change. And some of it is that hope is truly lost for the parents getting back together. That's what my DD says.
Sometimes she gets along well with fiancee's kids and sometimes she doesn't. However, I asked her if she remembers when she met them and she does not; I now realize they have been part of her life since she was 4.
X is passive and hasn't really said or done anything but I notice that DD cries a lot about missing him. Just when I think he's getting better, he is a no-show for something that matters to her, and she is crushed.
You may need to let go with the situation some. If the kids are old enough to decide and you're the parent who isn't playing psychological games, you may find them gravitating to you when they are older.
M: 16 years Bomb 4/07 OW 20s long gone Divorced 11/09 I remarried New Guy Cooperative r w/X regarding D