Blind Faith by Rebecca Zanetti is the third book in her Sin Brothers Series. 
 Man, I thought the last two were good... Nate was betrayed by the woman he loved. Audrey was everything good in his life regardless of the fact that she was the daughter of Dr. Madison, the evil bitch that created his brothers and other soldiers and spent her days experimenting and testing them in physical AND psychological ways. The countdown is is on for the Dean/Grey brothers. Their chips are still active and time is running out. 
 Audrey's world is rocked on it's axis when Nate shows back up in her life. She understands why he feels betrayed by her, and she isn't willing to fully explain to him the circumstances surrounding what he views as her betrayal. As the truth slowly filters out Nate is devastated by it. 
 Can they move beyond both their past mistakes and forgive each other for the wrongs they've so long perceived the other as doing? Can the Ddean brothers move past the fact that Audrey is the daughter of a sworn enemy? 
 Now I'm really on the edge waiting for the next book to come out in this series.