Your the presidents daughter so every detail of your life is practically public. The Avengers know who you are and have had to protect you from hydra once, hydra tried to kidnap you for leverage. What they don't know is when you were sixteen you some how got powers and kept it a secret from everyone took you months to keep them in control and now your with them again because there was another hydra threat her secret was well kept untill she went to the Avengers tower when something happened so casuel she used her powers to stop a thing from shattering on the ground and Clint saw.