His Secret Duchess — Gayle Wilson

Mary Winters harbored a secret deep within her heart. She'd borne the duke of Vail a child and was determined that no one -- not even the noble love of her life himself -- would ever uncover the truth. Afire with the passion of youth, Nick Stanton had lain with Mary Winters. Now, scarred by warfare in mind and body, he feared he'd be no fit husband to his beloved -- or father to the son now claimed by another man, a man whose one desire was to wreak vengeance on them all!