This is why she broke up with him!
I didn't read the book so please tell me where I've gone wrong!
I do believe Ana really fell in love with Christian. She was willing to go along with this perverted sex and felt that he would love her in the long run like normal couples......I don't know, maybe not but the attraction for Christian was very strong.
I think deep down she was getting a little frustrated with his control freak tendencies and not sleeping in the same bed hurt her a great deal. Also all the contract rules and not being able to touch him and show him any affection didn't help either. When she said to him show me the worst (meaning pain) and then she would realize that he would never be normal for her. I don't know what the meaning of the 6 hits were but the pain was real and if he could hurt her like that and get pleasure out of it then the end was sure to come. It did and her anger certainly showed revulsion towards him.