Cassandra Clare said this quote

Magnus rolled onto his back and put his feet up on the arm of the sofa. “What do you care if Alec’s miserable?” “What do I care?” Jace said, so loudly that Chairman Meow rolled off the couch and landed on the floor. “Of course I care about Alec; he’s my best friend, my parabatai. And he’s unhappy. And so are you, by the look of things. Takeout containers everywhere, you haven’t done anything to fix up the place, your cat looks dead—“ “He’s not dead.