Wife's Sexual Nightmare

My wife woke up a little agitated and mentioned that she had had a nightmare. She said a big Black guy was in her dream and she was a "crime victim." She was embarrassed to admit it, and I needed to specifically ask her -- the crime was r**e. She said in the dream that guy was "huge" and his penis hurt. But then he made her cum over and over and laughed at her each time. It was humiliating to hear because I'm rarely able to make her cum. But she was upset so it didn't seem like she enjoyed the dream. What does a dream like that mean?