y/n x avengers n40

You are y/n Stark, Tony's sister. You were sent away by yours and Tony's parents to be trained in Red Room, where you spent most of your life. You worked for Red Room, getting to know the Romanoff sisters whilst there. They treated you like their younger sister since you hated your biological family after they left you. Eventually, Natasha escaped, and you took her place as Dreykov's most prized assassin, until you also escaped. You lived on the run for a while until the Avengers captured you by using Natasha as a distraction, but she didn't know. She often visits your cell, unlike Tony, who avoids you at all costs, until the other Avengers all force him to come. You and him end up getting in an argument...