OH WOW. This is definitely getting memoried. I would love to see a sequel to this sometime too.
This was brilliantly set up, with such a fun plot and great characterizations and very hot action. I don't think I've ever read another fic with Sirius taking naughty pictures of Snape, and it's truly awesome that this is a fic with that plot.
The dialog between the two, their exchange, was so funny, so them. I enjoyed this so much.