A Winter Wedding by Nadine Millard

Her passion had caught him by surprise and it had been his undoing.

As the youngest of the notorious Templeworth girls, Sophia is determined to be the last of her sisters to remain unwed and unburdened by the shackles of marriage. If she had her way, she’d only have contact with males of the four-legged variety. Namely her horses. And it looks as though that’s exactly how her life will go.
Until the duke.

Devon Blake, the illustrious Duke of Farnshire, is used to getting what he wants, when he wants it. But when Fate lands him with two orphaned charges and absolutely no idea what to do with them, he’s rattled for the first time in his life. He decides that the best thing he can do is find a wife to help navigate this new, terrifying situation. And of course, any woman would kill for the job.
Except Sophia.

With Sophia determined to remain single, and Devon determined to make her his duchess, one of them will have to cave.
Will it be the most stubborn woman in England, or the most determined duke in Scotland who wins?