Jace knew… he knew something was up with Sebastian…
“Do you?” Sebastian asked with interest.
“Not really,” Jace said with a smile so disarming Simon knew he was lying. “My Romanian is pretty much limited to useful phrases like, ‘Are these snakes poisonous?’ and ‘But you look much too young to be a police officer.”
― Cassandra Clare, The Mortal Instruments: City of Glass