How? If that were the case, every instance of self defense would be considered being the agressor. Then what's the point of the "stand your ground" law? If you feel REASONABLY threatened, you have the right to fight back. Someone behind you on a sidewalk is not reasonable. Someone, in a car, following my wife in the dark... then getting out of the car and following after her when she tries to get away is a case for feeling REASONABLY threatened.
Nothing in your orginal post stsated that she was threatened. Do not try to change your story.