Well this book certainly has a twist to keep you guessing right up until the end! The author made it easy to understand how a marriage reached the point that it did in this book. I felt sorry for Sarah throughout the entire book. Then when she started an 'affair' with the brother, I kind of felt like Yes, you go girl! The ending made me go back and re-read some parts! OK, yes it was all possible. You'll have to read it to find out!