Oh hunni. hugs...
I've said this to you before. This is what i was worried about.

Not only does DD have to deal with moving, moving away from her dad, her friends, into a new home that isn't hers, and now she has to 'share you', she is also dealing with your DP's illness as well. No wonder she is acting up...

With your last post, I suggest even more that your DP backs off on the parenting a bit, he has to build a trust and a relationship first. You know my history, i've done this from your DP side, and i've had my fair share of issues with the kids, but the relationship was built first... it needs to be a gradual slow process. Lots of talking lots of hugs.

I am even more worried with what you said about you "playing with her for a bit" and then going and sitting with DP... How isolating she would feel, being up in that big new (to her) house alone. Maybe it might be better for all three if DP came up to the living area's and you sat up there with him...

I'm saying this outta love babe xoxox