Brian drugged leading to being unfaithful to Justin

[brianswalk.livejournal.com]

I'm looking for a story in which Brian has an out of town meeting with a man he's trying not to sleep with because he's trying to be monogamous to Justin. Brian wakes up in the morning in the man's bed and doesn't remember the night before. It turns out that Brian was drugged.
I also remember Brian and Justin were living in a house, but not Britin. Brian was seeing a psychiatrist. They were planning a commitment ceremony. It was part of a long fic.

Thanks


ETA: Found, link in comments.