Too much sex, and not enough explanation of what went wrong. Why did Rhett and Ethan break up? How did sex fix everything? I don't buy it.
I always like L.A. Witt's books, and for the first half I really enjoyed these characters, but it just didn't really go anywhere. If you want me to believe that they got back together, then you need to tell me A) why they got together in the first place, B) why they broke up, and C) give me a little bit more than sex as a basis for their reunion. This could have been really good but was just meh.