There wasn't really anything wrong with the book but I kind of found it bland. The whole book, the heroine tried to tempt the hero since she was attracted as hell to him but he resisted since he wanted her but for reasons he couldn't tell her, didn't want to give in. We are given hints that he is an undercover agent as we learn at the end for the FBI and he marries her to protect her, but tells her they won't consummate the marriage because he has morals and knows he is not what she needs. There is this over-eager man who won't take no for an answer and the hero knows how dangerous he is since he is the one he is investigating. He really doesn't enlighten her about his activities and she does think that what they have is one-sided since he always seems to be doing something for her.
To be honest I found no connection with the book, the heroine wants to get married at 30 because her mom had her when she was older and well that and other things posed problems(in the parental relationship). She finds the hero perfect and wants to know what is keeping him from taking what she is offering, her love and body. I kind of felt the book was trying to be over-ambitious, having a suspense thread running through. And wham the book was over.