Shit - I just read this one not that long ago. I remember a scene where Michael drops by the day after the funeral and assumes that Brian slept with Justin. Brian takes off, and Justin tell Michael how much the careless words hurt Brian. I think this is about the time that Michael notices that chair near a window that makes is obvious that Brian slept in the chair.
I could be imagining it, but the fic might be at moonshadow tribe, because I seem to remember it being a multi-chapter story with a colored background. I could be wrong on that part.
I'm running a search on my hard drive - if I come up with something, I'll let you know.