Torn Away From Her Highlander by Olivia Kerr

She has loved him for years. Now she must let him go.

Grace Gibson travels to Inverleck castle for her wedding, expecting it to be the happiest day of her life. Fergus has been her sweetheart since she was a young lass, but the spark between them is not there anymore. For some reason, her beloved will not even look at her.
Instead, Laird MacAndrew, Fergus’ brother, approaches Grace telling her that he has news for her. When he explains the situation, the lass feels like an avalanche is coming her way, and there is nothing she can do to stop it… The plans have changed: she will not be marrying Fergus.
Grace begins to wonder why Fergus changed his mind and if he ever cared for her in the first place. But she soon learns that there is more to the story. As the motives behind this arrangement are revealed, Grace wants to fight for her true love. But was it ever true love?