She runs the sink to splash water on her face and clean up quickly, superficially. It also allows her to indulge in a smile at his words. She almost wants to ask what he plans to do now, whether the casino owner's son would live and this part of Moriarty's web would remain free. But to ask would be to admit she doesn't know, and the distraction was over.

She dries her face with a towel. "Should I take that as a challenge?"