The Winchester Sister

Chapter 1: Your first hunt

Sorry if this turns out to be really crappy! I'm writing this while my wifi's down, so I'm not interrupted by anything. Anyway.... In this ongoing imagine, you will be living out your life as Sam and Dean's little sister! Hope you like it!
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Your POV:
You were staying in motel with your brothers while they were on a hunt. They left you alone while they went to get food, so you took that as a chance to sneak out and find something to do. You walked out of the motel room and started toward the nearest car, hoping you could steal it without anyone knowing. You started up the car, after 10 minutes of fumbling with the wires, and finding the keys still in the ignition. The car started moving forward and you stopped to pull your laptop out of your bag to look for a case. After looking for 15 minutes, you were able to find a case on the other side of town. You were sure it was a demon as soon as you found there building, because of the familiar smell of sulfur. Turning off the car, you gave yourself a small pep talk. "If Sam or Dean find out about this, you're fucked, y/n." You bit your lip and moved slowly toward the building, sliding the demon knife into your back pocket. You saw someone standing in the middle of the first room you entered, so you quietly moved toward them. They turned around, and you saw the familiar black eyes you had learned to watch for. "Oh great, another Winchester!" The demon snarled and walked over to you and reached for your hand. You pulled back, reaching for your demon knife, just as he demon said, "Let me guess. You're either one of their girlfriends, or you're-" You cut her off as you stabbed her. You smirked and finished her sentence with, "Their little sister," and finished the job. You ran back to the car and sped back to the motel room, only to find Sam and Dean waiting for you. "What the hell were you thinking, y/n? Going out by yourself?" Sam ran his hand through his hair. You smiled and looked back and forth between your brothers. "I found a case, so I took care of it." Dean sighed and looked at you. "We wanted to take you your first hunt once you were older. That's why we waited to take you." You looked at him. " It was a demon. She reached for me, and I yanked her ass." You told the whole story, and watched Dean smile as you finished the story. "That's my badass little sister!" Dean laughed and hugged you.