Hmm well now I don't know what to do:
On the one hand, I know that once I leave Madrid, this situation with her is going to end- I can't and don't want to carry on any kind of long distance relationship when my work in Madrid is done. By inviting her, I think it would kind of set a bad precedent for the way forward. Additionally, I don't know what my family will make of me brining some foreign girl to my mum's house over Xmas. They'll pretend not to mind, but I don't know...
On the other hand, I know its bad to leave her alone over xmas.