His Betrothed by Gayle Callen

She was a reluctant bride…
When Lady Roselyn Harrington discovers an injured sailor from the Spanish Armada washed up on shore, she’s stunned to see he’s the fiancé she abandoned at the altar two years before. When she’d first met Sir Spencer Thornton, he was far from the man of her dreams. But the Spencer she nurses back to health now is very different from the aloof nobleman who once scorned her. And in his strong embrace, Rose discovers passion…with the one man she can never trust.

He was a determined groom!
Spencer had jumped at the chance to escape London and serve Queen Elizabeth as a spy against Spain. And though he’s now dependent on Rose’s good graces to hide him from the traitor trying to kill him, Spencer decides to play an even more dangerous game: to make Rose fall in love with him so that he can reject her. But the impetuous girl has become a strong beauty, and Spencer’s intended revenge turns into a wholesale wooing of the one woman he can’t resist — his betrothed.