I am heart broken 



Had a meeting with ex on Sunday to discuss the dcs and the results of some tests carried out on ds.
I sat quietly through his long list of my bad parenting skills which included not forcing the dcs to shower.
However I was unable to sit still when he announced that he was applying for full custody of both dcs as they would be better off with him and that he had actually asked my dd (12 years old) if she would like to live with him, his new partner, her two children and a new baby due in December, and apparently she has understood all the ramifications and has said yes!
I have not seen her since before the meeting and I feel as if I am living in limbo land. She has definitely been groomed by her dad, I have noticed she has changed over the last six months into a moody obstinate child, who looks down on me because I don't have a proper job, and she is openly rude to my partner. I had put this down to pubity but I now know what its all about.
How do I handle it, does she really understand, moving schools, leaving her friends behind, leaving her brother behind?
She has only ever lived with her dad at weekends and holidays, wont she miss the closeness she has with her mum?
I alternate between extreme anger that she has been put in this position and incredible sadness that my little girl could be leaving me.
I know things haven't been easy recently as we have just moved house, but I thought that it would get better once we had all settled in the new house.
So what do I do now?
She will know that I have been told of their plans.
I am due to pick her up on Sunday and I really don't know how to behave with her.