Y/n x Avengers 4

You were in Red Room with Natasha when you were younger, and you two used to be inseparable. Until, you got in a fight with Natasha and she found a way to escape the Red Room so she left with Yelena, leaving you behind to the training of the Red Room A few years later, you barely escaped at the age of 15, and then moving into NYC. Not knowing that NYC was where Natasha and the Avengers live. You were also unaware of the fact that Natasha was part of the Avengers. You decide to go out, on your own, to treat yourself to some shopping. But what happens when you accidently bump into Natasha and the Avengers?