it's really going to break my heart when she finds out what's going to happen.
I know things aren't good between your W and you. But from my recent experience if you can present it together it will go better. Also, we bought three books for our five year old son: It's not your fault Ko-Ko Bear, Two Houses, and My Family is Changing. The first two might be a little too simple for your d, but maybe not. They've so far been invaluable with my s. We read Ko-Ko again tonight at his request.
Also, don't be too afraid of the move part. For kids your daughter's age moving is a great adventure. As much as my SD and S are upset by this, they are still looking forward to moving, new rooms, a new neighborhood, etc...
And be ready for the oddest concerns to come at you from left field. Tonight my son interrupted Ko-Ko Bear to tell me he was scared that there would be big rats at my W's rental house. I have no idea where that came from, but I can say that I never would've guessed that question.
Married 6 together 8 Me:38 W:31 second marriage for both SS12, SD10, S6 Bomb: 9/8/11 (day before our 5 yr ann) W moved out: 2/18/12 D final: 11/12/12 Share S 50/50. Spend as much time as I can with SS & SD