I'm not one of them c3

First period. What a drag. Everybody just had their eyes glued to me. It felt awkward. "Your Andy's little sis right?" A girl with sleek jet black hair asks. She looks scene and somewhat gothish. And she had a cow next to her
"Yes, I am the little sister no one knew about." I reply. I kept thinking about what I should say next.
"Wow, I didn't know he had a sister. You look really pretty." She said I think she's sorta faking it.
"You want me to show you around?" Strange girl asks. "Sure, I Andy is gonna be off somewhere else the whole day anyways." I told her in a normal tone. "Oh yea, I'm Madison. And thats Muffin Poop."
So from then on we talked and talked. It wasn't that awkward because I felt like I've known her for MANY years.
Even though I meet him like 10 mins ago. It was already lunch. And I had ever class with her. She was so friendly she had ALOT of friends. She seemed pretty cool with every clique. It was so weird. It was so surreal.
She introduced me to many of her friends from many groups. Most of the guys in all the cliques. Were one of her MANY ex-boyfriends. I wouldn't consider her a slut because they all broke up with her and stayed friends. But right now she's currently single.
I looked around everybody was saying hi to Madison, she was somewhat flirting with everybody. That felt SUPER weird.
I noticed a family. They looked the same as every other family but when I look at them they look aware of their surroundings, who's staring, and it looked as if they could read minds. But then again when they arrive everybody HAD to stop and stare. "I see you notice them." Madison notices when I looked over to their table. "Who are they?" I ask. "They are the..."