"I think I know exactly what you need." Hermione's wand flicked and conjured a blindfold, which she tied over the Slytherin's eyes. "Now let's review what I learned today..." Narcissa felt her hands being pulled behind her back and tied together with the double-column tie, then felt those familiar digits crook themselves around the waistband of her lacy pants she wore for her. Narcissa shuddered as she was helpless and felt them forced down and then slowly dragged across her thighs, baring her glistening sex to the open air in the room.