bluflamingo

Yes, exactly! I think there would definitely come a point where one or other of them would say, ok, enough, and then they'd have to worry about being together (like in Thin Thread Left, where John loses his team and they defeat the Wraith, and that's the point where he can go do something else), but they're both very 'duty and honor'. As you say, it wouldn't make a lot of sense for their characters for them to give it up without something to push them.