Marry in secret / Anne Gracie.

Lady Rose Rutherford - rebel, heiress, and exasperated target of the town's hungry bachelors - has a plan to grant her the freedom she so desperately desires: she will enter into a union of convenience with the biggest prize on the London marriage mart. There's just one problem: the swarthy and fierce-looking man who claims to already be her husband. When Thomas crashes her wedding to the Duke of Everingham, Rose fears for her sanity. The young naval officer she'd fallen in love with and married in secret had disappeared, gone like the ship he was thought to have died on four years ago, and in his place remains a cold, hard stranger with one driving purpose - revenge. Embittered by betrayal and hungry for vengeance, Thomas will stop at nothing to reclaim his rightful place, even if that means using Rose to do it. But Rose never did follow the rules, and as she takes matters into her own unpredictable hands, Thomas finds himself in an unexpected and infuriating predicament: he's fallen in love with his wife...