I've just invited my friend and her son (best friend to one of my dc) to spend Christmas Day with us. She is going through a messy marriage breakdown and would be on her own with her little boy at Christmas. I invited her when she told me this, and she cried with relief. 
Now I'm worrying that the rest of my family will be a bit bemused about it, even though they are all v kind and polite - we are used to v close family Christmases. I know I've done the right thing and I'm genuinely looking forward to her and her ds being here - but I just feel a bit bad that I've put my family in an awkward position, IYSWIM?
I either feel between a rock and a hard place or deeply uncharitable. I really hope this post doesn't make me sound mean but that someone understands why I feel a bit nervous. Please reassure me.