Clary Fairchild: Isabelle, can I ask you something?

Izzy Lightwood: Sure.

Clary Fairchild: Is Alec gay?

Izzy Lightwood: How did you guess?

Clary Fairchild: I...

Izzy Lightwood: You absolutely can't tell anyone.

Clary Fairchild: Not even Jace?

Izzy Lightwood: Especially not Jace!

Clary Fairchild: All right. I guess I didn't realize it was such a big deal.

Izzy Lightwood: It would be to my parents. They would disown him and throw him out of the Clave...

Clary Fairchild: What, you can't be gay and a Shadowhunter?

Izzy Lightwood: There's no official rule about it. But people don't like it. I mean, less with people our age—I think... But the older generation, no. If it happens, you don't talk about it.