I'm looking for the story 'The Morning After.' IDK the author's name, but it was originally on Azakaban's Lair (
http://azkabanslair.slashcity.org/TheMorningAfter.htm), which is, of course, no more.
In the fic it's a day after one of Remus' transformations, Snape tries to kiss him or something and Remus rejects him, then Snape goes around telling everyone they had sex, Sirius gets super jealous but then finds out the truth.
If anyone has this saved or knows the author or where it might otherwise be hosted, pleaaaaaase let me know! I'm dying to read it again!