The Engagement - Suzanne Robinson

From the beguiling author of Lady Dangerous and Lord of the Dragon comes an enticing tale of passion and intrigue that pits the daughter of a duke against a handsome stranger--a man who's part cowboy, part hero, and part thief...but altogether irresistible.

She was every inch a lady...but he was no gentleman...

Lady Georgiana Marshal was thrilled at her betrothal to the elderly Earl of Threshfield.
For the emerald-eyed beauty was sure that she would soon be a widow and finally in a position to control her fortune and her life. But no sooner does she arrive at Threshfield House than she finds herself accosted by a disreputable yet dangerously attractive stranger who means to ruin her plans....

Nick Ross had no patience for spoiled, blue-blooded misses, but when his best friend asked him to stop his sister from making a terrible mistake, he couldn't
refuse. That's why he showed up, fresh from the plains of Texas, sunbrowned and sweaty, with a revolver at his hip. Only Nick had underestimated his quarry: it would take more than intimidation to make Georgiana see reason. It might even take falling in love....