Okay since we all know that they are Brothers and Sister....(well most of us) i used to be 100% sure they are but to be honest they are so not!.
Yeah there are pretty good things to back up the reason they are but the story is based on them two, and if they do end up being Brother and sister well....i guess thats really sad. If i meet someone i didn't know it was my brother wouldn't you have a gut felling its is so you become mga kaibigan not lovers?. What about Clary mum having and affair with another man? or Clary not even being her real daughter? how abou that? But we all have to wait for a couple of months for Clarly mama to wake up and say the truth or we are all doomed!!!!! PLus clary and Jace.