As consciousness crept more fully in, Severus began to recall why he'd been nasty to her: she became a Death Eater and enjoyed torturing his students when he was Headmaster of Hogwarts. He had already opened his mouth to tell her off, even -- something along the lines of, "Well, you seen me, so you can go now!" immediately sprang to mind. The look on her face was so pitiful, however, that he didn't have the heart to say such a thing.
"Thank you for coming," he said quietly, offering her a small smile.