A/N: This chapter´s a special, the idea born from yos.mles. It´s about jealous Jace and I know it doesn´t really belong here, but I do have a reason to post it other than the prompt of a reviewer (which is also a good reason ;) I´m not going to give everything away so you´ll just have to read it to understand :P

Jace was sitting at their usual table at Taki´s with Alec and Magnus and listened to the conversation with half an ear. Isabelle was supposed to be there soon and Clary was busy with training. As to Simon, he honestly didn´t know.

„Speaking of hotties, Jace did you already see Clary´s new shadowhunter trainer?" Magnus asked slyly, making Jace sit up. „He is hot like the Earth´s core. If I were you I would fear that she leaves you for him."

Jace gave him an appraising look. „Oh come on, he can´t be hotter than me, that´s physically impossible. Alec tell him."

Alec was quiet.

„Alec, say I´m hotter than him."

Alec looked at him apologetically. „He is really damn hot, I saw him and I couldn´t stop drooling. Sorry, Jace."

Jace narrowed his eyes. „Seems like you should fear that Alec leaves you for him, Magnus."
Magnus snorted. „Please. Look at me." was all he said.

„Okay, so maybe he is attractive, but he can´t compete with my stunning personality." Jace argued, crossing his arms over his chest.

„Oh. My. God. Clary´s new trainer is awesome!"
Jace slowly turned his head to see the face of his traitor. It was, of course, Isabelle.

„He is such a gentleman and he´s funny and by the Angel is he good looking."

Jace growled. „We already established as much."
Izzy smiled dreamily. „You know, he pretty much beats you at everything. He even has that sexy accent, Latin or something. I swear, it makes every girl swoon."
„Not only girls..." mumbled Alec into his glass and Magnus shot him a look.

„Whatever," said Magnus. „I´m telling you this between man and man. I watched the two train for a bit. And from what I saw it was pretty obvious that Mr. Personal Trainer was hitting on Clary. By the look of things it´ll only take a few more training sessions untill she crushes on him. Maybe even less. Just listen to his name. Leonardo." He almost purred the name in a low voice to emphasise his point.

Jace scowled at him. „Oh come on. Clary doesn´t fall for bad hit ons."
Magnus raised a brow. „Maybe." he said. „But with that accent..." He made a sweeping gesture with his hand and let Jace´s mind continue his sentence. Which was a bit too imaginative for his own liking.
Jace was admittedly slightly worried. Of course he didn´t really believe that the new trainer was hotter than him, but nonetheless a hot guy who wasn´t him spending time with Clary was an unpleasant image.
„Is... is she still training?" he asked warily. Izzy nodded.

He gulped. „Excuse me." he said and walked away from their table at Taki´s slowly.
As soon as he was out of sight he started to run. He ran as fast as he could to rip Clary out of her new charmer´s arms.
If Clary really acted towards the new trainer like she did with Jace in their training sessions he had a big problem. Because fifty percent of their time was spent with making out, maybe even more.

When he arrived at the training room at the Institute he stopped dead.
The room was empty.
He swiftly searched the whole Institute for his girlfriend, which was rather hard as there were many, many rooms in the Institute. In the end, he just stood there, clueless.
Didn´t the others tell him Clary was training? With the so-called hot new trainer? Jace subconsciously clenched his hands into fists.
Abruptly he pulled out his phone and hammered a message to Clary.

Where the hell are you?

He restlessly paced back and forth waiting impatiently for an answer. It felt like hours when finally his phone vibrated.

On my way to the Institute. Why? Something wrong?

Jace bit on his lip. Okay Jace, he told himself. Chill.

Are you alone?

He typed, trying not to sound like a controlling bastard, what he definitely wasn´t. Not usually. Not if there wasn´t some guy who was able to challenge Jace´s sexiness, at least according to Magnus, Alec and Izzy. Jace rarely doubted himself, never actually, but to be honest, the guy who made those three people who had so completely different tastes swoon must be handsome indeed. Not like Jace, but still.

No, I´m not. You don´t have to worry.
Besides, I wouldn´t be that helpless if I were alone, especially after today´s training. I´ve learned some really cool new moves ;)

Jace stared. He tried to ignore how suggestive that sounded.
Maybe it was true what Magnus had said and the new trainer was trying to seduce Clary.
He couldn´t blame him, really. Clary was great. She was beautiful and cute, yet unbelievably strong and brave like he had seen it rarely in a girl. She was so warm-hearted and funny that it just wasn´t possible for any guy to not fall in love with her, except maybe Alec, but that was another story.
He could see it clearly. A suntanned idiot flirting with Clary while Clary was probably oblivious, or even better, annoyed by his advances. He grinned. Yeah, Clary would definitely turn him down with a sarcastic remark, or a kick at his ankles. However attractive the others claimed him to be, Jace would not worry, not with a girl like Clary as his girlfriend.

„Why are you grinning?"

Jace turned his head and looked straight into a pair of green eyes that never ceased to mesmerize him.
He smiled. „Nothing." he said. „I´m just happy that you´re here."

Clary raised her brows. „Happy happy or happy like – "

He stopped her by taking her by the hip and pulling her towards him. „Just happy. Although," he let his hand slide down her arm. „I know a way for you to even improve my mood." His hand stopped at her waist and Clary stood up on her tiptoes to kiss him – but suddenly Jace pulled away.

„That isn´t your shirt." he stated firmly.

Clary frowned. „No. I had to borrow one. I spilled water on mine and I didn´t want to run around with a wet t-shirt you know."

That would have been a good explanation, actually, if the shirt wasn´t a man´s and Magnus hadn´t told him about the hot new Personal trainer earlier that day.

„I´m sure he would´ve liked you to." he growled under his breath.

„What?" Clary stared at him, confused.

„Nothing." he said and turned his back towards her, walking off. Then he changed his mind and turned around again.
And nearly bumped into Clary who was apparently following him.

„So, do you like Leonardo?" he asked, trying his best to sound indifferent.

Clary blinked. „Leonardo?" she asked. „As in Leonardo DiCaprio?"

Jace made a face. „That name sounds ridiculous." he said and Clary laughed. „I don´t think so. And yes, I do like him. In fact, when I was younger I had a huge crush on him."

Jace´s jaw dropped. „You knew him? As a child?"
Clary frowned again. „Of course I did. Leo´s a real heart-throb. I knew him since the Titanic sank, well, if you can really know someone you´ve seen in the cinema a few times." she grinned.
Jace felt his face heat up in indignation. Did she really just admit to fancy that jerk?

„You call him Leo? And you dated that guy?" he asked outraged.

Clary stared at him as if he were mentally retarded. „What?" she asked, shaking her head. „Leonardo DiCaprio is a movie star. I don´t know him personally."
Jace opened his mouth to give a sarcastic remark until he realized what she had said. „Oh." he said.

„Then who is this shirt from, if it´s not from your new trainer?"

And yet again, he was met by an incredulous look of Clary´s and he felt like he had missed something important.
„What are you even talking about?" she asked. „I don´t have a new trainer. I trained with Izzy today. And the shirt is from Simon, if you have to know, because we were at his place and played video games. What the hell is wrong with you today?"
Jace blinked. „Oh." he simply said again.

„Yeah, oh." Clary crossed her arms over her chest. „Mind to give me an explanation now?"

Jace sighed. He knew he wouldn´t get away with this without losing some of his dignity, but he also wouldn´t get away without telling Clary everything. So he decided to be a man and just tell her.
When he finished, Clary didn´t say anything for a moment. She just kept gaping at him, what started to make him nervous, which rarely ever happened. The only people who could make him nervous were Maryse, Izzy and Clary. He asked himself what that was revealing about him.

Before Jace could fear that his girlfriend had frozen to stone or something, something unpredictable happened: a smile crept on her face.
„Jace Herondale. Are you jealous?" she asked in a tone that clearly indicated she thought to already know the answer.

Jace huffed. „Jealous? Me? Oh come on, Clary. I thought you knew me better."

Clary´s grin widened. „Oh, I do. And right now I can tell you are jealous. Of an imaginary person I might add."

Jace made a mental note to himself to kill Magnus when he next saw him. Surely, he was the one who had been planning this embarrassment. He had let totally let him trick him.

„Not an imaginary person, biscuit." said a voice behind them. Abruptly, Clary and Jace turned around. Seemed like the opportunity came faster than he thought.
„Leonardo is a very real person. The trainer part was imaginary." Magnus said mischievously.

Jace glared at him. He was very tempted to kill the warlock. The only problem was the fact that his parabatai was (for some mysterious reason) in love with him.
So he just made do with sending him black looks.

„Why?" he asked. "Just why?"

Magnus smirked. „You know why." he said simply.

And Jace knew.
He cursed the day he pranked the warlock with Alec pretending to flirt with demon boy. This was somehow worse than any possible threat of ducks.
Although, he thought, the look on Magnus´ face that day had been worth it.

A/N: Magnus´ Payback :D And Alec and Izzy just played along :P Poor Jace. If he just had more pop culture knowledge...