The Luck of the Devil1991

When Rowanne Wimberley meets Carey Delverson, one of the Delverson Devils, at Almack's, he is about to join his regiment in the Peninsula. Carey's service is grueling, and his new sense of responsibility makes him offer (unsuccessfully) for a young relative. Rowanne isn't waiting for this devil to capture her, but she's in no hurry to settle for a man she doesn't love. Regency Romance by Barbara Metzger; originally published by Fawcett