Alec drew his hand back with a low whistle. "The Inquisitor meant business." "Of course she did. I'm a dangerous criminal. Or hadn't you heard?" Jace heard the acid in his own tone, saw Alec flinch, and was meanly, momentarily, glad. "She didn't call you a criminal, exactly..." "No, I'm just a very naughty boy. I do all sorts of bad things. I kick kittens. I make rude gestures at nun

You’re my sister,” he said finally. “My sister, my blood, my family. I should want to protect you”—he laughed soundlessly and without any humor—“to protect you from the sort of boys who want to do with you exactly what I want to do.

My mother always told me if I rode a motorcycle with a boy, she'd kill me." ... She couldn't hear him laugh, but she felt his body shake. "She wouldn't say that if she knew me," he called back to her confidently. "I'm an excellent driver." -Clary & Jace, pg.289-

Jace, on the other hand, looked like the sort of boy who'd come over to your house and burn it down for kicks.