[Before she has a chance to chime in and explain to John that Booth's choice in reading material still very much incorporates that of a comic background, Booth gives her a look she doesn't quite understand. This cannot be about failing to mention her acquaintances to him. At least, not solely about that. Her partner does not possess Sherlock's rationality. He, unlike Sherlock, would be offended if she had failed to mention his presence to anyone she was on remotely friendly terms with.

In response to Sherlock's question, she shakes her head no. But Booth's statement is only met with a confused look.]

I don't know what that means, Booth.

Sherlock is my... colleague. [A more apt description than friend.] He possesses a keen intellect and a refreshingly rational approach to life that I have seldom seen in most. And Doctor Watson is... his friend.