Hey everyone! This is gonna be my first avengers story- so don't flame me please! And please don't mind the grammar errors- still have to work on those.

Anyways, I'm using a OC of mine- yeah- here's my OC personality and stuff- stuff-

OC:

Name: Lillian Elizabeth Stark

Age: 14

Height: up to Tony's shoulders

Who: Anthony Stark's younger sister

Life: Her name is Lillian Stark and she is unknown to the world of super heroes. No one knows about Lillian and was keep a secret by Tony himself for sometime. She is the youngest out of her family and helps out with Tony when no one is around- the only person that knows about Lillian is pepper, who has keep this a secret since Tony became Iron Man, and the Government. She lives a normal life. With normal friends. A different last name.

...Okay- her life story may be a bit bad who REALLY cares?! I don't . anyways to the story?

Disclaimer: I do not own Avengers- and if I did, tony and Loki would be together :D (do not ask .) I only Own Lillian and the Plot :DDD

Rating: T for Language.

Summary: Lillian Stark (OC) was on her way to her brother Stark tower to drop off something for her brother he, Tony himself, asked her to bring, but what happens when the other Avengers, Bruce, Steve, Natasha, Thor, Clint think she is a intruder? What happened if they find out shes is Tony's sister? I donno, your just gonna have to read! Some paring moments. (*cough*frostiron*cough*)

Lillian's Pov.

I walked down the streets of new york, off to the Stark Tower... You wonder why? Oh because my idiotic of a brother had made me go to the store, buy something and then bring it to him. He knows im suppose to be a secret- wait. Let me introduce my self first.

I am Lillian Elizabeth Stark. And yes. I am Iron mans sister. I'm 14 years old, living a normal life, in the countries, having no one know who I am, okay, maybe they do know me but not as Stark. As a Jones. I live on my own, the government knows that, they don't care as long as I don't explode anything. I mean, yeah, living a normal life is nice and no paparazzi around. Its nice! My life as Lillian Stark/Jones is a great deal! I have been keeping this secret since I was born! Not even the Avengers know about me besides Pepper. Tony wanted me to be keep as a secret because he thought that if I was exposed to the rest of the world as a Stark, enemies would come after me. That's the only reason on why i have been keep a secret all my life.

More or less, I am Anthony Stark's younger sister. So, back to the story now..

I walk into the stark building and greet JARVAS, and told the AL to send a message that I am here. But of course, being the don't-think-before-coming me, I walk onto the elevator and press the 'Living Room' button. I didn't know what was to come my way.

Narrators Pov

The Avengers were sitting around the living room, watching a movie, which was Hetalia Paint it white. (sorry had too xD! Oh anyone who's a Hetalia Fan! Tell me in the Comments! :D) It was pretty much, Thor, that wanted to watch it since it was on. Tony got up and sighed, "I need to grab something, I'll be right back.." He said and walked away, gaining a few, 'okays' and nods from the rest.

Lillian was on her way up, it was pretty high so maybe a few more minutes or so until she reached to where she was going, she looked into the bag to see if she missed any of the things Tony wanted, she nodded to herself and smiled, noticing there was nothing missing. She looked at the top of the elevator where she could see the number of what floor she was on, '5 more to go..' she thought. She started to play with her red and pink striped shirt.

Tony was on his way to his room when JARVAS came through, "Sir, Lillian is on her way up, shes about to enter the living room." said the Al. Tony's eyes widen and raced to the living room, but was too far to stop the rest of the Avengers. He started panicking, he knew they didn't know about Lillian. Only the Government and Pepper knew about her, he started to pick up pace but knew he wouldn't make it on time.

Non of the Avengers noticed the numbers on the elevator moving up, they only noticed when they heard a 'ding!' come from the elevator, which caught their attention, they paused the movie and went over to the elevator. Natasha being the only one with her weapon, took out her gun and pointed it at the elevator as Lillian came out from the elevator. Shocked of course. She dropping the bag, "Fuck! I should of stayed downstairs!" she said to herself, backing up until she was pressed up against a wall, her eyes filled with fear.

"We aren't gonna hurt you, we just want to know who the hell you are and why you are here" said Bruce, in a sort've calm voice, trying to reassure her that everything is gonna be okay but, she still shook with fear as her eyes were trained to the gun, she gulped and was about to scream when she heard someone say 'stay back!' her eyes soon darted to the man who had his knees on his hands, breathing heavily. She quickly got up and hid behind him, still shaking with fear.

Natasha moved her gun quickly, following the girl, so her gun was pointed at both Tony and Lillian. Lillian quickly wrapped her arms around his waist as Pepper came out from hearing all the yelling and to see what was all the commotion. Tony finally caught his breath as he looked up at the confused and angry Avengers. He sighed, knowing he was gonna have to tell them about Lillian, he pulled her off of him and guided her to the couch. She was still shaking with fear, her eyes darting from each and every Avenger. He placed her on the couch, but not before asking, "Did you bring the stuff?" he asked, she sighed, a shaky sigh which was still filled with fear, pointing to a bag near the elevator, he got up and went over to the bag, look through it before placing it on the table before walking back.

He gave her a hug and a smile as Tony looked at the still confused and angry Avengers. "Stark. What is the meaning of this?! And who is this girl?" Asked Steve as he was clearly mad, then confused. He sighed, "Well.. I guess it's no point in hiding this anymore..." he said to himself mostly, Lillian muttered a quiet 'sorry' and clung her self more to his arm, not looking at the other Avengers.

"Now before I start and explain why she is here.." he looked towards Natalia, "Please put away the gun, shes only a 14 year old..." he said to her. She grumbled and placed it back in her pouch, and crossed her arms, "Explain Stark." she said staring at the 2. Pepper went and set herself beside Lillian, rubbing her arm softly to comfort her.

"Well.. This is my younger sister.. Lillian and-" "Wait- Sister?!" half of the Avengers yelled out, stark only nodded before continuing, "Yes, sister. I had keep her a secret to the world, because I did not want to endanger her with my life actives. She kinda means the world to me, besides my parents and all but she does mean the world to me and I do not want to lose her-" "But why keep her a secret, SHEILD could of keep her safe." Said Steve.

"Safe? Safe?! Really?! Can you REALLY call this SAFE?! The H.Q almost being plunged into SEA SAFE?!" he yelled at them, pulling Lillian a bit closer to him like she was one of his inventions. He doesn't like it when his sister was in danger, mostly because she is unstable.

Pepper sighed deeply, "Lillian was born a bit unstable is what he told me. Its the reason why he's so protective of her." she said to them, "and Lillian knows this. Its why we keep it a secret from everyone, her being scared can put her into a state no one really likes, she can either, be in fear for the next hour, get sick or die." their eyes widen as she said Lillian could die from being scared so much. They all looked at Lillian who was still clinging to Tony, she looked calm, and it looked like she wasn't breathing, Stark began to panic and turned her around only to find out she was sleeping. They all let out a soft sigh. "Pepper, put her in your room for now, I'll.. figure things out with the rest."

Pepper nodded and gently took Lillian from Tony and started walking to her room, where she placed her down on her bed and covered her up before returning to the rest.

I guess thats it for now? R & R and I'll see if I'll continue the story- maybe maybe not and sorry if Tony is a bit OOC.. . I try my best, ne?