Friend wife.

Hard to tell. Sometimes the term gets used as subderfuge so the person can act on feelings they believe may be inappropriate to the relationship from lack of reciprocity, reprisal if it's against policy at work, or if it violates the terms of another romantic relationship. I don't know if it's fair to automatically call the use of the phrase dishonest, but it definitely provides harborage for those who would use it that way. If someone at work referred to me as their work spouse, I'd quickly help them find a better term as nicely as possible but without compromise on that point. I just can't see a valid, ethical reason not to let other people know where they stand with me. I mean that in the best possible way, and I don't think "work spouse" accomplishes that in a way that both defines and honors the relationship most effectively.