*flail* I definitely didn't expect this prompt to be chosen, so I squeed with delight even before I read the fic. Yes, I am a sadistic bastard, but then, Snape suffers SO beautifully, IMHO *shifty eyes*
So! I got a delicious, dark fic, and wow did it deliver! Right off, I thought your portrayal of Pettigrew was spot-on, and I didn't expect for him to stand out as much, because he's just Pettigrew you know? But his breathy, by-stander, more-turned-on-by-watching just seemed to really suit his personality, as one too cowardly to get really hands on, but content to just be involved somehow.
James and Sirius, of course, are berks and jerks, and their arrogance was perfect - not needing an engorgement charm but using it anyway - and this line was really telling: as they stripped off his clothes as carelessly and callously as if they were denuding a mannequin. Ooomph! The collar, the cock ring, the casual and pointed insults, the perfunctory sex (touching him as briefly and as little as possible), was all dark and sinister and cruel.
Then came Lupin. WOO! My first ever pairing in HP was Snape/Lupin. And werewolf smex is a BIG kink for me, and you delivered! EEEE! That scene was really HOT, and I loved love loved it when James finds them and tells Snape, "Move away slowly"... and Snape's rebuttal, "He was better than you!" was just CLASSY. XD
Snape and Lupin pairing up, and Snape willingly wearing his collar was a good counterpoint to being made to wear it UNwillingly earlier, and their thoughts and revenge, afterwords, was not only well-thought-out, but works well as a "behind the scenes canon" story. Very dark, very delicious. Thank you, this was definitely worth waiting for!!! :D