Draco's expression narrowed a little, almost as if he was upset - torn between not wanting to ask it, and not wanting to tell her it was none of her damned business.
But her hair felt familiar in his fingers, and she was still talking though they were this close, when he was sure Pansy would have shut up already, but even that felt comfortable.
Which is possibly why he did what he did, next. Pull her in toward him to catch her mouth almost chastely, when he should have set her away and just left.