I don't think her coming home for Christmas is a good idea.
The crowd is too young, immature and uses bad language? Come on now. I feel terrible that she's in that place (that emotional place) but I too have felt that kind of desperate, frantic it'salbetternowiswear kind of thing. I didn't think I was lying but I wasn't close to recovery, either.
I can only share my own experience but I've heard it from others too. Once I was REALLY done drinking, I was silent. I didn't even tell my husband I had quit for a while. It's such an intensely personal and kind of studious event. I don't know. Being 'in an awful state' worries me and makes me think that Christmas would be a disaster if you let her come home.
Strength to you