West End Earl by Bethany Bennett

While most young ladies attend balls and hunt for husbands, Ophelia Hardwick has spent the last ten years in disguise. As the land steward for the Earl of Carlyle, she’s found safety from the uncle determined to kill her and freedoms a lady could only dream of. Ophelia’s situation would be perfect—if only she wasn’t hopelessly attracted to her employer.
Calvin, Earl of Carlyle, is determined to see his sister married this season. And he’ll do it with the help of his trusted right-hand man. But when he finds out Ophelia’s secret, and that her life is in danger, his priorities change. Their attraction is passionate, all-consuming, and if they aren’t careful, it could turn downright deadly—for both of them.