"Rosalind, I'm going to put a few drops of this in your tea. Do you recognize what it is?" She nodded. "Good. I know this all must be very scary for you, but none of us want to hurt you. I just want to ask you some questions and then later Mr. Lestrange is going to come in and ask some more. It's very important that you tell us the truth, so the Veritaserum is going to help you."