"You're a disaster for us, Clary! You're a mundane, you'll always be one, you'll never be a Shadowhunter! You don't know how to think like we do, think about what's best for everyone- all you think about is yourself! But there's a war now, or there will be, and I don't have time or the inclination to follow around after you, trying to make sure you don't get us killed! Go home, Clary. Go home!" Jace yelled, not knowing what he was saying. Alec and Isabelle stepped backwards, hands over their mouths, shocked.
Clary staggered backwards, her mouth wide open. "Jace..." She whispered, hanging her head, before meeting his eyes again, but this time, they held determination and a cruel glint. "Fine. I'll go." She turned to the stone wall beside her and started drawing a Portal. Just before she stepped through, she turned to Isabelle and Alec. "Bye, guys." She hugged both of the Lightwoods. She looked at Jace, expressionlessly. "Goodbye, Jonathon." Jace flinched. She nodded, as if the flinch was her cue and stepped through the Portal.

Alec and Isabelle stared at where the Portal had been only moments before. They looked at each other and stared at Jace, disappointment and anger in their eyes. "What?" Jace said, confused.
"God, Jace. You're such an idiot. Do you even know what you just did?" Isabelle yelled.
"No. What did I do?" Jace said, puzzled. Isabelle shook her head.
"I'm fed up of you and how you use girls, Jace. Call me when you actually evolve to have a pair of balls." Isabelle stormed back towards the Institute. Jace stared after her.
"Alec, your sister's insane. I haven't done anything wrong."
"Sorry, bro. You're on your own."
"Wait. Alec, where's Clary?" Jace asked Alec's back.
Alec laughed, humourlessly. "You're such an idiot, Jace. You sent her away. Didn't you hear yourself? You told Clary that she was a disaster for us. That she was a mundane and always will be one and that she'd never be a Shadowhunter. You told her that she was selfish, that she only thought about herself, rather than everyone else. You also basically told her that you didn't care about her. That you didn't," he showed air quotes, "'have time or the inclination' to follow after her. And, what clinched the deal was that you told her to go home. So she left. She made a Portal and left." Alec looked at his brother unsympathetically. "Jace, you've just ruined the best thing that happened to you." With that Alec turned and followed his sister.

Jace fell down onto the pavement. Had he really said all of those things? He hadn't meant to. He was mad and she was the one he took it out on. His Clary. Well, probably not his Clary, anymore. Suddenly, he jumped up. He hailed a taxi and asked the driver to go to the Fray household.

Jace jumped out the cab and ran to the door. Jocelyn opened the door and glared at Jace. "Where's my daughter?" Jocelyn asked.
Jace's shoulders slumped. "So she's not here. Have you checked everywhere? She just made a Portal." Jocelyn left and searched the entire house.
She came back later with a note in her hands. "Jace. What did you do? My daughter is a sensitive, talented, selfless, unique Shadowhunter. She'd rather kill herself than let any harm come to any person she cared about. Especially you and me." Jace hung his head. She extended the note out towards him. "Read this."
Jace took the note and looked at Clary's cursive, flowery writing.
Hey, Mom.
Sorry, but I'm not sure I'm gonna come home tonight. Or any night for the rest of the foreseeable future. It has nothing to do with either you or Luke. It's not Simon or Isabelle or Alec or Magnus either. It's not even Maryse or Robert. It's probably the least likely person you thought would hurt me. Jace.
He told me that I was basically a dead-weight to the Lightwoods and that I wasn't a Shadowhunter, but a mundane and would always be one. He said that I didn't know how to think like a Shadowhunter, how to do what's best for everyone and that I always thought about myself. Well, maybe I do. I don't know.
To help me, and to relieve everyone of the burden that is me, I've decided to move. To a different Institute in a different country. I know what you're thinking, but I'll be fine. I promise. If you want, I'll even call you at nine tonight.
Hoping to come back a better person,
Clary x
P.S. If you see Jace, please slap him. Or punch him. Whichever floats your boat.
Jace looked up a second too late. Jocelyn punched him in the gut. "Sorry, Jace. Just following Clary's last orders."
"Nope." Jace wheezed. "That's totally fine. I deserved it." Jace looked at the digital clock. Eight fifty nine. "Jocelyn. Look at the time." She looked and ran to the phone. Exactly as the clock changed to nine o'clock, the phone rang. The ringtone was Clary's favourite piece of music. Jace winced. It was the piece he'd first played to her.
"Clary? Sweetheart, where are you?... Why not?... Oh, I suppose I understand... What?... Oh, yes. I got your letter... I punched him... You're welcome... You'd've liked to have seen his face? Well, he's here now. Do you want to speak to him?..." Jace looked up, hopefully. "I'll take that as a 'no'. Okay... Well, if you're sure... Bye, sweetheart... Stay safe." Jocelyn put the phone down. "I'm sorry, Jace. She said that she'd rather taste Isabelle's food and cut out her tongue than talk to you."
Jace looked down. "I understand."
Jocelyn patted his shoulder. "Just give her time, Jace. She'll come around."
Jace smiled at her, sadly. "Clary obviously hasn't been angry around you often, then. I've seen her angry firsthand. Nothing can make her come around."

Jace left Clary's house and made his way back to the Institute. At home, Isabelle ignored him, Alec ignored him, hell, even Church ignored him! Maryse made as little contact with him and Robert was barely around anyway. Jace knew why they were acting this way, and completely agreed. He deserved this. He deserved even worse than this.

Clary landed in front of the Wellington Institute in New Zealand. She knocked on the door. A small girl opened it and said, "Hello. Are you a Shadowhunter?"
"Maisie!" An elder girl behind her shouted.
"No, it's fine. Yes, I'm a Shadowhunter. My name is Seraphina Nightflame."