[At first, Juno thinks that he might've drawn the wrong conclusion. Maybe Holmes was a fiance, or a missed opportunity. But then Watson finally speaks again, and Juno...feels mildly confused? Why would--

Time shenanigans. Right.]

Ah. Nah, that's understandable. It's a Martian thing, I guess. At least you guys have each other and...stuff. [What do you ask people about their relationships?] Sorry, didn't mean to pry too much into it. How...How long have you guys been together?

[Here's to hoping Watson doesn't think to ask about Juno's own relationship status. It's...definitely complicated, and he doesn't really want to get into that to a practical stranger. Or, really, anyone. Juno "Internalize Everything" Steel. That's him.]