Mischief is My Middle Name

When the attack on New York happened Anna was only 13 years old, her parents died while at work. Then a couple of months later she's caught right in the middle of the battle in London. She soon forgets about what happened. Memories slowly came back to her. Now she's a 15 year old, living with Jane Foster and Darcy. An Avenger adopts her against Fury's orders, that no child shall become of the Avengers. That they will not give birth or adopt a child, due to a high risk that the child will be killed, kidnapped, or be a security danger to SHIELD. When the Avenger adopts her they keep her a secret for a week before Nick Fury found out. Just before he takes Anna back to Jane he finds out she's not human. That she has powers... What will Nick do with her then? Have her tested on? Locked up? Or will he just take her back to Jane? Before he can make a decision war breaks out and the Avengers must protect earth again. THE BOOK MIGHT NOT GO AS DESCRIPTION SAYS IT WILL!!! Thank u.