Just told me. Asked him whilst out at the weekend apparently. He's going to be on his own if not.
We already have my Dsis and family joining us, who have never met this friend, and aren't social by any stretch. BIL in particular is quite reserved.
I have said categorically no, it will be awkward for everyone (even I don't know him well, it's been well over a year since I've socialised with him), but he can come Boxing Day. I appreciate it's not in the spirit of Christmas, and if it wasn't for my Dsis I'd welcome him with open arms. Dh says I'm being a bitch.
So, over to you Mn... AIBU to say no?