He nodded and then, knowing if he stopped to think about it he’d lose his nerve, he said rapidly, "I’m more sorry than I can say about what happened to you with my aunt. She was... she was not well, and please believe me that if there had been anything I could have done...." He stopped because it seemed so inadequate.  How do you apologize to someone that they’d been tortured in your home?  He was sure not a single etiquette book in Narcissa Malfoy’s extensive collection covered that.  Which spoon to use for some obscure and unpleasant fruit?  Absolutely.  How to tell a wizard you weren’t interested without starting an international incident?  Yes.  This?  No.