“Sebastian just smiled. â€œI could hear your heart beating,â€  he said softly. â€œWhen you were watching me with Valentine. Did it bother you?â€ â€œThat you seem to be dating my dad?â€  Jace shrugged. "Youâ€™re a little young for him, to be honest.â€ â€œWhat?â€  For the first time since Jace had met him, Sebastian seemed flabbergasted.”
— Cassandra Clare
Tags: humor, jace-wayland, realization, sarcasm, sebastian, valentine-morgenstern