City of the broken heart (The Mortal Instruments fan fic)

Clary and Jace have been a couple for two years now, but all hell breaks lose when Jace does something so despicable that it causes Clary to leave him, Isabelle to despise him, Magnus to cry and Alec become sick. After two years of separation Clary moves back to New York and is put in the same school as Jace but her and her companions are here to be on a mission but Clary soon finds out what the real reason is for them to be there. What is it? And does Clary still love Jace? Well she can't really have a choice seeing she's stuck with him forever.