Showing Hunter of My Heart by Janet Kendall

That was what Sabrina Barrington would be if forced to marry. The secret she guarded made it impossible for her to be anyone's bride, much less the enigmatic Earl of Kenilworth's! But blackmail had prompted her wedding vows, and made her his unwilling prisoner...

The ghosts of the past were all too solid for Hunter Sinclair, yet to ensure a future for those he loved, he would do anything - even marry Sabrina Barrington, a woman whose mystery both infuriated and intoxicated him, heart and soul!