Cassandra Clare said this quote

Rage flared up in Tessa and she considered belting Woolsey with the poker whether he came near her or not. He had moved awfully quickly while fighting Will, though, and she didn’t fancy her chances. “You don’t know James Carstairs. Don’t speak about him.”“Love him, do you?” Woolsey managed to make it sound unpleasant. “But you love Will, too.”Tessa froze. She had known that Magnus knew of Will’s affection for her, but the idea that what she felt for him in return was written across her face was too terrifying to contemplate.