Heh!
As he feels her press closer to him, he reaches out for her hand, as much for his own comfort as to comfort her. And to facilitate running at a moment's notice, of course.
"Yeah," he agrees in a low voice, pausing as they reach a junction, and pausing to peer carefully around the corner in both directions. Nothing, but he thinks he can hear the distinctive whine of an approaching Dalek. "You hear that?" he asks softly, trying to determine which direction it's coming from.