A/N: the next chapter may take a little while to come as I'm still trying to work out how to go about it. Also thank you for the reviews so far. Want to see more from Agatha, the Shadowhunters and Magnus Bane?

Chapter 09

Michael Wayland spoke with Jace, Agatha and Clary as they took another portal. Clary not saying anything about Agatha being able to create portals. Where they ended up was the Jade Wolf with Luke. When Michael wasn't looking Agatha created a portal straight back to the Institute to talk with Hodge.

"Hodge! How did you let Alec do this?" Agatha screamed at the older man when she walked back into the institute.

"Agatha, it was not my choice," Hodge took her by the arm and pulled her to the side away from everyone. "Alec wanted to do this,"

"I don't care that he wanted to do it, you said that you wouldn't let him do anything stupid," Agatha told him taking a deep breath. "Hodge, that was the one thing that I asked of you," she paused as she before she spoke again. "It was the wrong time," She closed her eyes and felt that Jace was stronger. Agatha walked away and went to find Isabelle and Alec again.

She walked straight past Inquisitor Imogen Herondale, glancing at the older woman and smiling at her before she continued on to Isabelle. As soon as Agatha stepped into the room with Isabelle, Isabelle wrapped her arms around her. Agatha and Isabelle staying hugging until Alec walked into the room again.

"Honestly?" Agatha questioned, shaking her head at Alec as he walked in. "You nearly killed your own parabatai! You're not aware of that are you?"

"No I didn't," Alec said indignantly as he looked at Agatha and then at Isabelle.

"Yes you did, Alec why do you think the bond is so weak?" Agatha knew that he had to have known what had happened, and that he just didn't want to believe it. "You follow the law religiously yet you forget about the fact that me, one of your best-friends is part down-worlder,"

"Shut up Agatha," Alex hissed at her, Isabelle hadn't moved from beside Agatha as the two older shadowhunters spoke.

"Alexander Gideon Lightwood, you could have chosen anyone to propose to. Hell I think your parents wouldn't have cared if you had done it to me," Agatha told him, grabbing his arm and pulling him towards her. "Alec, please don't do anything else that is stupid," Alec looked at Agatha as she spoke her words seemingly not sinking in. "Alec..."

"Aggie, don't," was all Alec could think of to say to her looking away as he did so.

"Big brother, she's right and you know it. Agatha is your best-friend before Jace, she knows you," Isabelle told him as she looked between the two of them fighting again. "Even though she was gone she was still here, I don't know how to explain it,"

"Alec when you decide that you've made the right decision you'll find me," Agatha told him, before she started to walk off to go find somewhere quite to study and practise.

"Aggie, I'm sorry," Alec mumbled after her, causing Agatha to stop and turn around to face him.

"It's not me that you need to apologise to,"

Hours later and Jace and Clary were back – they had found Jocelyn with the help of Luke and Michael Wayland turned out to be not who he said he was. Agatha's gut feeling had been right, and Clary had told her as much. Jace walked through the Institute after they handed the Mortal Cup to Lydia, which in turn got Isabelle free from charges, and looked for Agatha he needed his older sister.

"Has anyone seen Agatha?" Jace questioned, standing in the middle of the steps leading to the training room.

"She was talking with Isabelle a short while ago," Lydia answered, she had come to trust both girls and hoped that they could trust her to some extent. As soon as Jace heard that he was on his way to finding her still.

"Jace, I'm in here," Agatha called as he walked past the library, Jace abruptly stopped turned around and walked straight over to her. "What is it? Jace what's wrong?"

"Did you know?" Jace questioned, grabbing her hand as she moved to turn the page in the book she was reading.

"Did I know what?" Agatha was confused as to what he was talking about. "Jace?"

"Valentine is our father..." Jace muttered, he didn't want it to be true, it couldn't be could it?

"What? No!" Agatha exclaimed, dropping the book in her lap and pulling Jace towards her. "He can't be,"

"But he is," Jace mumbled, Agatha sighed and wrapped her arms around him.

"Jace, please trust me," Agatha told him, her arms still wrapped around him as she spoke. "You're my baby brother and you always will be. You have to promise me that you'll trust me always,"

"I do trust you, but what he said – he said that he raised us," Jace said pulling away from her as she spoke and looked at her. "That Clary is our sister," Before Jace could pull away too far Agatha pulled him closer ad hugged him.

Agatha and Jace sat talking until Clary found them – by then they were in Jace's room. Jace didn't want to talk with her at all so ignored her to a point. Agatha sighed pulling Clary aside to talk to her while Jace stewed over the apparent revelation.

"I know that Valentine is my father, that much is confirmed...but him being Jace's father makes no sense," Clary told her she was just as confused as them. "If Jace is your brother and his father is Valentine, then does that make you my sister?"

"I guess it does, but do you believe that? I treat Isabelle, Max and Alec as my siblings though they aren't I love them as though they are," Agatha replied, she wasn't sure if it was right but she had to know what the younger girl felt. "What did he tell you after I left, and after Jace was better?"

"It's not what Valentine said, rather what Luke said...Things weren't adding up so I asked him about how long it had been, he said that it was twenty years ago," Clary paused, looking at Agatha and then over at Jace. "Aggie, how much older than Jace are you?"

"Just under three years older than him, I'm not much older than Alec," Agatha was quiet after she answered, glancing to her baby brother as she spoke. "Clary, everything will work out for the best, you'll see just trust your instincts,"

"But Luke believes it too," Clary told her almost at the point of breaking down.

"Come with me," Agatha took Clary's hand and lead her from Jace's room and towards her own room. "He just just needs time, Jace can be pig-headed,"

"I've notice that, but I've also noticed that he cares about his family more than anything," Clary told her, as they entered into Agatha's room.

"Clary, he does and that's why this both hard and confusing for him," she motioned for her to sit down before bringing to her a sketchpad and pencils. "I know that you love him and that you can't explain it, loving Jace will never be easy but you will love him for a long time,"

"How do you know all this?" Clary questioned, Agatha smiled at her and watched as she started to draw.

"Izzy told you I was complicated, yes? I never know why I know the things that I do know. But I learnt from Magnus that I should always trust others before I trust myself..."Agatha told her pausing briefly before she spoke again. "I'm telling you this, because I trust you. Magnus is my older brother, like Jace is my younger brother. The only people out side of this room who know this fact are Luke and Alec,"

"How do they know?"

Agatha and Clary sat talking in Agatha's room until both girls were to the point of falling asleep. Clary learning more about Agatha's relationships with those in the institute than she thought was possible.