I think calling this a romance is a stretch, Harlequin stamp notwithstanding.
The heroine has amnesia. And she's not liking what she sees, either in herself, or in others. Even better, someone is out to get her, and her husband doesn't believe her.
The hero's reason for marrying the heroine seems to be a business arrangement gone awry. Basically, his dad left him the property, and her the money.
Problems arose when a married chick he'd been screwing around with (makes face) and his/the heroine's distant aunt plant all sorts of seeds of doubt in the heroine's mind while she's getting ready for the wedding. And then problems start. The heroine runs in fear for her life.
She awakens in a hospital with no memory of what happened, but she was found in a car with a dead man, and a lot of cash. The dead man, as it turns out, was her father, and he was strangled.
Eventually the culprit outs himself, the H/h get together, the end.