Song of the West by Nora Roberts
Former Olympic gymnast Samantha Evans and her twin sister Sabrina have chosen very different directions in life, but they are still as close as sisters can be. So when Sabrina begs her twin to help out during her pregnancy, Sam leaves her big city life behind for the countryside.
Sam thought she knew what to expect on her sister's ranch. But she wasn't expecting to find gorgeous but infuriating Jake Tanner - or have to deal with his teasing. Sam tries to keep her distance, something keeps pulling her back. Perhaps there's more to Jake than meets the eye . . .