Black Widow

She is the definitive spy and double agent of the MCU – when she was introduced in Iron Man 2, she was sent by Nick Fury to infiltrate Tony Stark’s group. Then, during the Winter Soldier events, she actually gave the impression that she got close to Steve Rogers, only to be revealed in Age of Ultron that she was actually romantically connected to Bruce Banner.
So what gives? Is Iron Man so silly in order to believe that she is on his side? Leaving her past aside, it is pretty hard to believe that she will ruin her friendship with Hawkeye for someone she doesn’t really trust. She also has all the reasons to be against the registration, given her past as an assassin.
So is Black Widow actually on Iron Man’s team during Captain America: Civil War? Or is it all just an act?
And the best thing about this, if it proves to be true, is if Tony Stark realizes that she is indeed a double agent and uses this to his advantage.
