I believe it was after a conversation at Woody's with Michael. Brian says something along the lines of "Justin and I don't need words" and Michael challenges them to go a week (or something) without speaking.
I remember the last line is when Brian and Justin are fucking, right after they're allowed to speak again, and Brian says "Don't you ever stop hearing me again", referring to the Ethan-era.
I know I've found the fic originally on here, but for the life of me cannot remember what it would be tagged as. I checked the post-308 reunion tag, because of the last line, and found nothing.
Thanks in advance!
Found!
Words by Triciaqaf