EDIT-STORY FOUND in comments, my thanks to marlivia, for responding, and the anonymous commenter, whoever they may be, who gave me the link to the fic I was searching for.

I'm looking for a specific fic where...

Virgin!Bottom!Sam gets Dean to have sex with him by lying and telling Dean he had sex with someone else (I'm pretty sure Sam tells Dean it was only one person), since he knew Dean wouldn't touch him otherwise.  Dean goes totally possessive/jealous and is totally NOT cool with with someone else (supposedly) taking Sam's virginity.  There's lots of dirty talk, and towards the end he starts interrogating Sam about sleeping with someone-else/other-people (like demanding who he let take him, or how many other guys took him, something like that) and Sam says that Dean was the only one (in so many words).  Afterwards Sam confirms that he lied to Dean since he knew Dean wouldn't act and have sex with him otherwise.  I'm pretty sure the sex is also at least somewhat rough and there might be some name calling.

I tried to put in as much detail as I could recall, but I only read the fic once, and it was a while ago.  I would hugely appreciate any suggestions, pointers, or best of all, links!