Reluctant Bride by Joan Smith
Elizabeth Braden, known as Lizzie, was settling happily into spinsterhood (she claimed she never wanted to marry anyway) when two things happened. Her carriagesmashed into that of Sir Edmund Blount and someone stole her diamonds. Between Lizzie and Sir Edmund it was hate at first sight. He was an irascible tyrant and she was a spirited nag. But for reasons not even understood, Sir Edmund undertook to find Lizzie's stolen necklace - and found he was also looking for her heart.