It Takes a Thief by Anne Stuart

Emma Manchester was a proper young lady with the soul of a pirate. For the last twelve years she’s done everything she’s supposed to do, while yearning to break the rules, and now she’s engaged to marry a respected magistrate and her future looks bland and assured, without the chance of ever sailing free.
Ben Crawford was the love of her childhood, her partner in crime, until he was driven away by her harpy of a mother. Now, all of sudden he’s returned as Nick, king of thieves and ruler of a den of criminals, and she still feels the same way about him.
But the judge isn’t about to let her go and Nick doesn’t want to drag her into the mess his life is, especially since the judge and he are at odds. And yet, he cannot stay away .

What’s a girl with the soul of a pirate going to do?