I had a headcanon throughout the movie that she (her, not black widow) was Harriet Jones (you know, "Harriet Jones, Prime Minister", "Yes, we know who you are"). After "The Stolen Earth" and "Journey's End", she joined World Security Council to discreetly defend the world against more Alien threats.
So I was walking at school and some guy tried to cut in front of me. I wouldn't let him so he called me a bitch. The look on his face when I turned around and stood right in front of him was priceless. You basically just admitted you're a pussy to me and your friends because you're afraid of this "bitch" haha