In Chapter 6, we can see how Mark and Cathy’s relationship evolves. Being the two most important people in Mark’s life, we would thnk that they would actually get along pretty well. This is not the case during the sixth chapter. Cathy isn’t impressed at all when Mark had one of his impulses and hit the guy in the Corvette who had made an obsene comment. On another hand, she doesn’t really approved how Mark and Bryon used to drink at such a young age. We can conclude that Mark and Cathy don’t really like each other throughout the chapter and are not ready to make any effort to get along either. They are both fighting for one person: Bryon.