This was per-fect. There are so many good parts, I can't begin to quote them all. You have such a way with words and you've written everyone so well. I particularly loved this:

"I brought the ham," he says, trying not to grin.

"You are the ham," Remus says, then grabs the knit of his reindeer jumper and drags him in to kiss him senseless.

Wonderful fic, well done! :)