"Izzy," said Jace, as they neared the pond, and she jumped up and spun around. Her smile was dazzling. "Jace!" She flew at him and hugged him. Now that was the way sisters were supposed to act, Clary thought. Not all stiff and weird and peculiar, but happy and loving. Watching Jace hug Isabelle, she tried to school her features into a happy and loving expression. "Are you all right?" Simon asked, with some concern. "Your eyes are crossing." "I'm fine." Clary abandoned the attempt. "Are you sure? You looked sort of... contorted."