She had often considered stealing the Map from Harry, imagining what it would be like to  really follow Draco’s every move. Irrespective of her diligence, there were still moments throughout the day when even she didn’t know where he was. With the Map in her possession, she would be able to see when he was in bed, or when he was taking a bath... Hermione’s heart pounded as she imagined "accidentally’ walking into the Prefects’ bathroom and finding him unclothed. The thought alone was enough to dampen her knickers.