I really was not liking the book halfway through because Cam was overly controlling. To the point where I considered him a pimp instead of a threesome participant. I felt Domini was somewhat brainwashed or at the very least peer-pressured into some of his antics. The "Trust your body when your mind is in doubt" adage is the worst advice for cajoling someone into going past their limits. Very grey, almost rape-y for me. I don't like it.
In the end, Cam redeemed himself and that says a lot because he had a long way to go.