Sherlock started to say something, probably a reflexive protest of some sort: after all, he was still getting used to the idea of having a real friend, much less a partner, so his default response was withdrawal. But Susan--Susan, of all people, who could not have been more than eight--slid off the couch and patted the space where she'd been sitting. Right next to John.

Oh. Well.

He murmured a quick thank-you in Susan's direction before settling in next to his partner. There was really no logical reason why he should feel so relaxed in someone else's personal space, but then there was really no logical reason for anything else that had happened in the past year, either.

Harry watched them both with interest and perhaps a touch of concern. She was good at people; despite all the jokes she'd been cracking she was starting to form a real picture of this relationship as a very serious one. Which she hadn't really expected from her brother.