Nobody is trusted.

She grew up alone in this cold world. Alone, and forgotten. Until somewhere along her life, HYDRA picked her up, and claimed her as there own. Obviously she felt the need to trust them, let them in. Submit to them, they were her only thing close to a family, so she let them test on her... do experiments and highly architectural researches using her. She was fine with it, she felt nothing was wrong. But on the day after her 14th birthday, she gets a notification, notifying her of a new mission. One specifically to take down the avengers, will she accept. What happens if she does? .. will a certain red headed widow find out she is a mother, will a certain lonely young girl find out she has a relative.