Austen Variations discussion

Hello, I have lost a lot of my ebooks and there is a P&P variation I would like to re-read. I just cannot remember the title!
Elizabeth and Darcy marry but do not love each other, they are compromised but I cannot recall the scenario. I know the Colonel Fitzwilliam family are not nice and his elder brother harasses Elizabeth and his wife constantly looks in a mirror! Darcy is a brute to begin with. He believes she has run off with Wickham at one stage. Any help would be appreciated. Thank you.

I think this is Obligation and Redemption by Georgia McCall. In this E rescues D after a fall from his horse in a rain storm, they are compromised. Darts pretty badly for most of the book.

Amazing - that is it. Thank you so much!