Teddy didn't make it a habit to be out of bed after hours, but he still wasn't sleeping very well so he felt it better to sit in the common room and study than stay in his bed tossing and turning. He was pretty sure even Professor Snape would be hard pressed to fault him for studying rather than sleeping. It wasn't like he was breaking any big rules instead of snoring.
He automatically grabbed his wand when the unexpected burst flew through the door. However, as his eyes focused on who entered, he frowned. "Mafalada? Love? What is it?" She looked like she had just seen a dementor.