She recognizes the kind of approach, even though she notices it too late and jumps a bit once she does - dropping what additional pebbles might have been in her hand - and thus refrains from looking directly at him, either, instead throwing a glance at the group which she was with, that is currently walking up to the next door.

"Why?"

It's clear enough that she will heed the advice for the moment, at least until she has heard the reasoning behind it.