city of nightmares

Clary and Jace are now together , happier than ever.
But their happiness is tempered by their insecurity and some bigger troubles that neither of them are able to control.
Indeed, Jace is dealing with uncontrables nightmares that are ruining his relationship with Clary, and making him forced to do horrible things, therefore, Clary is trying to understand what is going on with Jace, but she feel useless and sad, because she thinks that this is all her fault.