Disclaimer: I own none of these characters. They're all Cassandra Clare's! :o)

Isabelle walked into the Library of the New York Institute and found a seat in a secluded section. She wanted to be by herself, she has ever since two months ago when it happened. She had so many thoughts running through her head, many of them started with why. She avoided her parents, her brothers, Simon and even her best friend, Clary. She knew what everyone was thinking. They all thought there was something wrong with her, and there was, she just didn't want any of them to know what. She heard their whispers. Their comments that they would make on her clothes, on how she never went out anymore, or how she rarely talked to anyone. She had even heard Clary listening at her bedroom door as she sobbed into her pillow. She hoped that they didn't hear her screams at night from her repeating nightmares, but even if they did she just didn't care.

A hand clamped onto her shoulder and she reacted quickly. She grasped the hand and with a quick twist flipped the owner. Meanwhile she grabbed the dagger, she had always kept on her since it occurred, and brought it to the person's throat without hesitation. It wasn't until she looked at the person's face that she realized it was Clary. Isabelle jumped back quickly withdrawing her dagger. "Cl-Clary, I-I'm s-sorry." She stuttered out while backing up, then quickly spun on her heel and ran from the room. What in the name of the Angel did I just do, she thought running towards her room as silent tears streamed down her face.

Clary still lay on the floor gasping for air. What the hell just happened, she thought. Isabelle had been acting so isolated. She never went out anymore and rarely talked besides the general 'hi' 'fine' 'no thanks' and 'later'. Clary recalled hearing cries coming from Isabelle's room, but she never brought it up figuring that she would confide in her when she wanted. She loved Isabelle like a sister, and she was scared for her. She was a little scared about what just happened. It hadn't been the first time that something like this happened either. Isabelle would flinch when someone would go to touch her. She stopped dressing in her normal cloths. Simon even made a comment about her shirt one day and when he went to touch it she started screamed 'NO! DON'T TOUCH ME!' and ran from the room. Her whole appearance changed, not just her clothes. Her shiny black hair was untamed and oily, dark circles hung under her eyes like black crescents which was a horrible contrast to her sickly pale skin.

There was something wrong with her and Clary was now determined to find out what it was. Clary heard the door to the Library open and close followed by five pairs of footsteps. She wasn't ready to get up off the floor, Isabelle had flipped her pretty good and she still was attempting to catch her breath. The footsteps reached her and she opened her eyes to see her friends' amused faces. "Clary baby, what are you doing on the floor?" Jace asked leaning down to her.

"Will you just wipe that look off your face and help me up." She told him with a slight glare. He smirked and gave her his hand, pulling her up. "Thanks." She muttered to him.

"Well Clary…are you going to share with us why you were on the floor?" Asked a sequenced clad Magnus who was standing with his arm around Alec.

"Isabelle." Clary said softly. Everyone's face showed either confusion or worry.

"What do you mean Isabelle?" Simon spoke up. Clary had discovered a rune that allowed him to come into the institute which was rather helpful when he wanted to hang out with them. Clary looked away from everyone. She didn't want to talk about Isabelle behind her back, it just felt wrong, but something needed to be done. "Clary what do you mean?" Simon repeated lightly grabbing her to face him. "Please tell me." Simon cared for Isabelle, he liked her a lot maybe more than that, but then there was Maia. He didn't want to choose between them, he didn't want either of them to get hurt. Honestly if it came down to a choice he wasn't sure who he'd pick. But right now all that he cared about was what was wrong with Isabelle. He too noticed her change, she wasn't the same as she once was.

"Well…okay let's go sit down and talk." She told them going to take a seat on the other side of the library, she turned when she noticed they weren't following. "My head hurts," she explained rubbing the lump forming on the back of her head, "I need to sit down." She turned back around and took a seat on the couch. Jace took a seat by her, grasping her hand in his, and gave her head a quick peck. She smiled at his act of affection. Magnus and Alec sat on a love seat, and Simon and Maia, who has yet to speak, sat on the couch across from them.

She told them how she saw Izzy walk into the library and decided to follow her. "I was worried about her. She's been acting so weird lately, actually for the past two months she has been acting strange. When I found her sitting over there," she pointed to the section where they had found her. "I put my hand on her shoulder, and I was about to speak when she flipped me. Then she pulled a dagger and held it to my throat. It was like she was empty and was just acting on instinct. Like she had no idea what she was doing, and her face," she shook her head at the image of her best friend's face, "it was…it was full of terror. When she realized it was me she backed off immediately then ran outta here like a demon outta hell. There is something wrong with her, but I don't know what. I'm her best friend and I have no clue what is wrong with her!" She groaned and leaned her head back against the couch, closing her eyes.

Clary had felt Jace tense and a look of anger crossed his face when he heard Isabelle pulled a knife on her, but his features changed to one of worry when he heard how she was acting. "Clary is right. She barely speaks anymore. Even when I make comments to egg her on she just takes them, she doesn't even snap back like she normally would." Jace replied with a frown.

"Something must have happened, and we need to find out what. I think that someone should talk to her and I vote for Clary." Maia said finally putting her two cents.

"I agree with Maia. If there is anyone that she will talk to it would be Clary." Alec spoke in a matter-of-fact tone. The rest of them nodded in agreement.

"Alright, I'll go talk to her." Clary sighed and stood up. "Let's just hope this works." She told them as she walked out of the Library, heading to her best friend's room.

A.N: I know this is short but it's my first fanfic and I wanted to see what people thought of it first before I continued. :o) So my request from anyone who reads this is to please press that green button and review! I welcome all constructive criticism, but please don't be rude. I will update within a week if people like it, so if you review that will happen! :oP First three reviews get a sneak peek!

I want to thank my lil sis Rose, RoseTwilighterDP on here, for being my beta and reviewing this small scene for me. She is an amazing writer --I'm soo proud of her-- and has 2 MI stories, City of Bones and City of Shadows. Both of them are awesome so I suggest for you to check them out! :o)

So I'll leave you with some questions for you to think about:

Why is Isabelle acting so strange?

What is this it that she is talking about?

Will Clary be able to help her best friend?

Will Simon ever choose between Maia and Isabelle?

READ,REVIEW AND FIND OUT! :o)