Sandra's face shifted from angry to puzzled. "Well, Thomas, while I think we both know who would win out in a duel between us," She said, looking at Mariana quizzically, "I do have to admit you've surprised me. Pleasantly, which is an interesting change." She waved her hand in front of Mariana's face, and seeing no reaction, began to pace around her slowly, looking her up and down. "You have complete control? Interesting. Was it an unbreakable vow? No...she looks like she's on drugs. Imperio then." She smiled, satisfied. "Well done Thomas. You're sure she's under your control?" She shook her head. "No, it doesn't matter. She wouldn't last long, even if she did break free." Turning on her heel, she walked to her desk and pulled the bottom most drawer open, shuffling through the contents until she pulled out a clear glass vial. "It just so happens I have some Veritaserum here. No offense to your magical ability of course, but one can never be too certain, can they?" She asked. "If you don't mind, could you sit her on the bed? We should do this as quickly as possible."