Hermione agrees to pretend he's taking her in like a ridiculous prize, but only if he agrees to an Unbreakable Vow. She insists that she can't be too cautious when he's offended. She acts as their bonder since she's not making a single promise to him. In the middle of the forest on the outer rim just beyond the wards, Draco Malfoy swears he'll never turn her over to the Order.