http://www.amazon.com/Undeniable-Rogue-Rogues-Club-Book-ebook/dp/B006RLZVF0
A battlefield promise to a dying comrade, and Gideon St. Goddard, Duke of Stanthorpe, comes home from Waterloo to take a bride.
Aware that romance and matrimony aren't always compatible, widow, Sabrina Whitcomb, nevertheless, needs a husband. While providing for her children is paramount, wedding a stranger—even a wealthy one like Gideon St. Goddard, Duke of Stanthorpe—is no light matter. So why did the shockingly handsome rogue agree to marry her? When Gideon flashes his wicked, seductive smile, the reason hardly matters.