Jace sucked in a breath at the mention of them being engaged. He looked down for a moment. “Where I’m from, Clary is my sister.” He said quietly. There was a moment of silence. “No one understands how much I love her. She won’t even understand. How are you together if you are siblings? I’m skeptical because my father told us. Alec confirmed it was a lie. I don’t know how to convince her it was a lie.” He said sadly.