I always felt that she would have taken him back after the fight but it was due to the public, that she broke up with him.  She was trying to save her career/image and probably listened to others and then add on top, Oprah Winfrey giving her advice and so she broke up with him.  If they had been a regular couple and not famous, she would never have broken up with him in the first place.  So now, she is not listening to anyone and doing what she always wanted.  This is her lesson to learn (like it's for so many other woman) but she is doing it publicily.