Twelfth Night with the Earl by Anna Bradley

When a headstrong beauty clashes with the man she once loved, she’s determined that the spirit of Christmas will open his mind, heal his heart, and perhaps give them a reason to celebrate—for many seasons to come . . .
As far as Ethan Fortescue is concerned, his family’s seat in Cornwall is only a source of torment, one that he’s managed to avoid for two years. Now that he’s the Earl of Devon however, he can close the door on his haunted past by locking up the cursed place for good. But upon arriving at Cleves Court, he is shocked to find the house aglow with Christmas celebrations, filled with music and laughter. And right at the center of the holiday madness is the infuriating—and eternally tempting—Theodosia Sheridan . . .
Thea has always loved the town of Cleves, especially at the holidays. As a girl, she also loved Ethan with all her heart. It’s painful to see how his brother’s tragic death has embittered him. Still, she will do anything to make sure the town thrives—even if it means going to battle with Ethan to save Cleves Court. Now she has only until Twelfth Night to make a Christmas miracle happen—by proving that his childhood home can be a source of love and wonder. But before long, she finds herself wondering if she’s trying to save the house—or its handsome master…