Handfasted in Haste. Wainwright Sisters, #4.5

Grace Cameron and Duncan MacTavish grew up beside one another, and Grace always dreamed of Duncan becoming hers. He never seemed to look at her as anything more than a friend until their first kiss when they were in their twenties turned into a hand fasting. They soon learned that passion doesn't put food on the table, and their constant arguing everywhere but in the bed didn't make for a peaceful existence.
Eleven years ago, Grace walked away from their hand fasting. They've been arch enemies ever since - or so she thought. Duncan has never loved anyone but Grace, and he knows she's his good luck charm. Having her by his side will guarantee he finally wins the caber toss, and he's determined to woo her back.