you know what, you never know what the future will bring. I think it is fine to tell her that you would love to have the family be together, but things don't always work the way you want them too, and we just have to trust in God's plan for our lives whether she comes back or not. But you know that you will always be there for her and that nothing will change your love for her.
idk. I'm sure that is so hard to hear. my kids weren't realy close to their dad, my 3 year old was oblivious almost, and my 9 year old, or maybe he was 8 would only cry because I was crying. so I never really had that issue with my kids.