AN: So hi, this awesome person made this incredible story line and everybody in Tumblr was freaking out because it is just awesome.

Here is where you will see fireworks, on blaineandersons.)tumblr.)com/tagged/sibling%20au

Sumary:

I could feel our breaths mixing with the proximity, we were chest to chest even if the space surrounding our bodies was enough for us to pull away.

He was forbidden territory, I tried to remember myself, my sister's best friend, my sister's boyfriend's brother, the only guy for who I would make a fool, or be anything he wanted, the only person who made my heart beats so fast that should be illegal.

The one that now was inches from me and whose lips screamed at me to kissed them.

So I did.

Thirst for you.

By Catherine Sommers.

Prologue:

It wasn't that there weren't many kids on the block but, for some reason, none of them liked me. Even if my dads were lovely, caring and always babbling about how a beautiful daughter they had, neither neighbors nor their children were as warm.

Whenever I tried to talk with someone on the playground they would just laugh and call me names that I couldn't understand or just stared at me with those big eyes and, suddenly, they would cry and called for their moms.

My dads had explained me that most people didn't understand us, the way we lived or how we were formed as a family, that they had an idea of love that had a limit. When those words came out of my dad's mouth I replied, no hesitation in my voice:

"You had always told me that love has no limit."

The smile they shared at my words made me proud, but the conversation died with my sentence and thousands of questions were filling up in my mind.

It was February when I finally told them.

I had watched all of the kids got a friend which whom they would do every single treat they wanted, they would make sleep over's, share ice cream on the porch or share secrets under covers that simulated castle walls just with a lantern on.

I found myself wanting that. And what Rachel Berry wants, she gets it.

That is why that same morning I approached to the kitchen with all the weapons I could "I need a word with both of you" my voice confident while I took a seat in the tall chair they had for me so I could be at their same level at the table. My dad's looked at me, smiles in their faces as they parted their embrace and took a seat as well.

The environment had a bitter taste, like this would cost me more than a few right words or some tiny tears. I tried to remain serious as I spoke: "I want a brother."

The change was instant, their smiles no longer visible and their hands weren't laced anymore. I saw them watch each other and then, me. Hundreds of emotions in their eyes and thousand words hanging on their mouths, but they didn't say anything, they couldn't.

"I need a brother, or a sister. I'm all alone" I felt my eyes watering "I want a partner for my games, someone who would like me and not being afraid that I had some virus. It doesn't matter if I have to share my toys; I would be delighted with it! Because, what's the point in having a room full of fur animals, Barbies and lots of stuff if I can't show them to someone or used them with someone?" I saw daddy Lou bit his lip and shot a glance to daddy Michel but at the second he opened his mouth to speak I cut him again "It's not like when I said I wanted a fish and then Mr. Shinny Star died when I forgot to feed him, I'm six now, I know the responsibilities, and I also now that this brother or sister that I want isn't just a pet or something to play with. I want him or her, but mostly it is a need, someone who will hear me talk about everything and nothing and that will share with me things that will just be ours"

At the end of the little speech I felt three things going in slow motion.

First, the saltiness of my tears on my parted lips, then the embrace of daddy Lou while he whispered things into my ear that were softly but incomprehensible, and the sight of daddy Michel getting the phone and started talking so fast I could barely follow.

A few days later I was on the back of the car, singing along the songs on the radio. I didn't knew where were we going but it wasn't worth asking, they had said "It is a secret" and when it was a secret, it was a secret.

We had traveled what seems like days when the car finally stopped.

"Get out, Rach" daddy Michel said and held my door open.

I couldn't believe what I saw.

The view was full of children, all playing on the grand play yard on multiple games that seemed very used, with the colors of the painting long ago gone on several parts.

Both Lou and Michel took one of my hands; leading me inside the building I hadn't notice until now.

Grey walls were slightly decorated with several draws, trying to give a little bit of color to the house I immediately decided was too sad to live in.

Of course, if you compare a basement with your own stage, a room full of the things you like, paint in your favorite color, as the walls and corridors were filled with family portraits or art galleries works, everything with lack of shine and glitter seemed sad.

When we were approaching to what looked like an office a lady came out with a smile printed on her face. Michel released my hand and took a few steps to talk with the woman into whispers, even if I tried my hardest what they said would had only appeared to be a secret code only they could understood.

Lou was watching them closely too, as if trying just as me to know what was all that about, I was going to tell him that it was Mars language when the lady looked at me and smiled again, warmly.

"Rachel, right?"

I just nodded.

"Let me introduce you to your new brother."

My eyes went wide, I could feel my smile hurting my face and my heart racing in anticipation. The door of the office finally opened entirely and I saw him.

He was so little, even if his curly dark hair cheated on his height you could tell he was younger by looking at his eyes. Hazel honey eyes, like melted gold, that sine as much as his shy smile.

"Rachel, this is Blaine." She said pointing to him with her hand. "Blaine, this is Rachel."

I closed the gap between us in three large steps, my arms surrounding him and his body unable to move at the shock of sudden affection. When we were inches apart and I saw into his eyes again I knew something time would prove.

Blaine was going to be everything I needed and I was going to be everything he wanted.

AN: English is not my first language so if you see any mistakes, please tell me.

Also, this is just the prologue, you will see why is so short no many chapters after.