"You're the one taking up the whole house," he retorts in very obvious hyperbole. It's bad enough having to hear peoples' thoughts half the time, seeing their memories is that much more annoying. Even if the kid's right about it basically being his own fault.

Penny begins to storm off, only to stop halfway to the stairs and turn back. It's an awkward consideration and one he's hesitant to make. When he speaks again, his voice is considerably less annoyed and accusative. "Does Sherlock know?"