Forever in my Heart by Susanne Matthews

All Callista Hayworth has ever wanted was to be loved. Callie’s heart was crushed six years ago when she walked in on her twin sister in the arms of her fiancé. She fled Timberton and cut all ties with the last member of her family. She’s rebuilt her life, but some things can never be fixed. When she learns of the tragic accident that has orphaned her infant nieces, she sets aside her anger and returns to the scene of her greatest heartache. What she doesn’t expect is her reaction to the twins’ uncle and his proposition.
Michael Branscomb swore off women years ago, after the woman he loved left him for his best friend. A deathbed promise to his twin brother has to be honored. The last thing the confirmed bachelor wants or needs is a wife and children, but you don’t always get what you want. He’ll do almost anything for his twin, but can he marry a stranger?
When he meets Callie, commonsense goes out the window, and he proposes a marriage of convenience, offering each of them an end to loneliness and a promise at the future they want.
Will the spirit of Christmas convince Callie to give him a chance, especially when there’s a Grinch in the works determined to see the past repeat itself?