This may be a silly question, but has anyone ever tried this with six players (three couples)? I only ask because that is the number of people in my D&D group, and I could totally see us having a blast with this.
i haven't seen a triple-couple AP, but i think it would work more or less the same way as a pair of couples — the main issue i could anticipate as a possibility is one that already exists, which is that one couple might reach and resolve their boiling point/ending much faster than the other couples, but that's not a problem if you don't mind having them then just pitch in to the shenanigans involving everyone else :)