I wouldn't have been saying this a few months ago, but can you think of this as a "slip" instead of a relapse? My AH has been seeing an addiction counselor and she shared with me that sometimes my reaction will determine how long his slip/relapse will last. Last time my AH slipped I got very upset at first, and normally that would have lasted for DAYS and WEEKS. But within 24 hours I had a grip on my own emotions, and told him I was proud of how well he had been doing, etc.
He got out of his "slip" almost immediately. Not that I had power or control over it, but I do think our reaction can help.
Good luck!