Midnight Wedding by Ruth Ann Nordin

Miss Lydia Hamilton is desperate. She needs to secure a marriage to a wealthy gentleman, and she needs to do it fast. Enlisting the help of two brothers, she kidnaps the unwitting Lord Quinton. Under ordinary circumstances, she would never force a gentleman to marry her, but these aren’t ordinary circumstances.
Guy Milton, the Earl of Quinton, is not happy. It’s extremely bad luck to be kidnapped. Nothing good ever comes from it. Now doom is imminent. His kidnappers are going to kill him. He just knows it.

But instead of killing him, he is forced to marry Lydia. While one would think this would come as a welcome relief, such isn’t the case. Marriage under force by a lady with redheaded brothers means even worse luck. To make matters worse, they hurry him off to a country estate where he is confined to a place full of so much bad luck that he’s sure this is where he’ll die.
When Lydia decided to kidnap a titled gentleman, she thought her biggest problem would be convincing him to get her with child. She didn’t think she’d have to convince him that he’ll live long enough to survive the task.

This is a romantic comedy with a superstitious hero, a heroine who needs money, and an estate with a classic gothic feel to it.