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Enough, both of you,' Clary said. 'You can't be complete jerks to each other forever, you know.' Technically,' said Simon, 'I can.' Jace made an inelegant noise; after a moment Clary realized that he was trying not to laugh, and only semi-succeeding.

Cassandra Clare (2011). “Cassandra Clare: The Mortal Instrument Series (4 books): City of Bones; City of Ashes; City of Glass; City of Fallen Angels”, p.1275, Simon and Schuster
Enough, both of you,' Clary said. 'You can't be complete jerks to each other forever, you know.' Technically,' said Simon, 'I can.' Jace made an inelegant noise; after a moment Clary realized that he was trying not to