He hadn't really hurt her, not in the physical sense, except the one time he had used the Cruciatus Curse on her in anger. That day, she had rebelled at the wrong moment, when he had been in a bad mood after a meeting with the Dark Lord. He had held her afterwards, stroking her trembling back as she cried. He had said he hadn't meant to do it but had lost control in his rage. It was an apology in all but name.