"Mistletoeless Rooms", Sirius/Harry, R

Title: Mistletoeless Rooms
Author: traintracks
Fandom: Harry Potter
Pairing: Sirius/Harry
Rating: PG-13/soft R
Word Count: 500
Warnings: chan (15), or AU set ahead (take your pick); godfather/godson
Disclaimer: I don't own much of anything, least of all anything having to do with Harry Potter.
A/N: This is for adventdrabbles and prompt #24: mistletoe.

( It was late when Sirius said goodnight to Harry in the study at Grimmauld Place. )