"Got in first, I believe," he sighs, and picks up his teacup. "It was in reference to him, not her, that I mentioned the potion. Got in first, and after the wedding flaunted himself so far beyond the bounds of decorum, courtesy, or decency that," this with a slight, whimsical smile, although he isn't joking, "I have had, over the years, to sacrifice several lab animals and doses of polyjuice to the cause of your continued existence." He makes a face at a particularly vivid memory. "Narcissa is, as you know, both imaginative and, er, not at all squeamish."
He looks a bit sheepish. "Well. I'm afraid it didn't really occur to me that the encounter was unlikely to end in blood. And Narcissa had already taken an amiable interest in me prior to your appearance."