[Meanwhile, Sebastian doesn't seem to take much notice of the wariness. He's looking down at his shoe - or, more likely, the ankle he cut - with a thoughtful frown.]
Well, that is quite fortunate. I'm afraid washing it ["the blood"] off right here and now would be awfully crude. [Showing ankle? In front of a lady and everything? Heavens, no.]
Again, I apologise, but saying you are "fine"... [She must be hungry, reacting so strongly to such a small amount of blood. A vampire's blood, at that.]