Draco sighed deeply before beginning, unsure really where to start. "The mark on your arm - the dragon - it was required by the Dark Lord. Created by Yaxley. From what I've been told, mudbl- I mean...muggle-born servants are required to receive the mark if they serve a Death Eater household. It prevents you from things like leaving the property without permission, requires you to obey commands from the person who gave you the mark..." He paused, watching her expression, but her face betrayed nothing.