The Duke's Shotgun Wedding

Lady Jocelyn Rathbourne was taken in by a pretty face and even prettier lies, leaving her family's reputation at stake. When the man who made promises to her announces his engagement to another woman, she knows the only way to avoid a scandal is to marry the cad's brother, the cold, formidable Duke of Calydon.
Sebastian Thornton, the Duke of Calydon, is in need of a wife. Bored with the simpering ladies and overly-forward seductresses populating the ton, Sebastian longs to find a woman with fire and spirit. He never expected the perfect candidate to barge into his home, aim a derringer at his heart, and demand he marry her...