Very proud of the way you handled this - clearly you are doing well in recovery.
I gotta tell you I am seeing some red flags aside from the drinking. Not sure I buy the story of how this happened. Not sure if that is overly important except that just a week ago you caught BF laying out of work and lying about it. I'm questioning if he is in full relapse mode. The explanation he gave sounds all warm and fuzzy, but it also sounds full of quacking.
I would expect a call to a sponsor today, meeting or meetings, a full throttle "get it under control". Watch and wait.
I do hope this was just a minor slip up - am hoping today you see him more ramped up to maintain sobriety.