Meet the avengers

Y/n Stark is 20 and Tony and Pepper's child, Morgan's sister(she's 8).
You were kidnapped when you were 15 by someone and Tony found you when almost 20(not that long time ago).
No one knows you are Bisexual.
You already know Thor, he is your bestfriend and you went to Asgard with him when you were younger(so you obviously know Loki too).

Tony saved you and will introduce you to the avengers but the thing is you changed, you're not the same as you were. You will be an avenger but you might be a spy working for someone else...

Will Y/n betrayed the avengers? do you have powers? who is the person who kidnapped them? are they still talking to him? Will Y/n finish her mission at all cost?