All I Desire by Rosemary Rogers

Angela Lindsey enjoyed a pampered existence among French society, but she has had to trade it all and agree to live on her father's New Mexico ranch in order to collect her inheritance. While the wide-open land may boast a rugged je ne sais quoi, it's a certain insolent man in uniform who is the first irritation of her new life - and an irresistable lure to her heart.

Captain Jake Braden has little tolerance for a fancy rich lady ill-prepared for the rigors of a territory rife with danger. He may have to escort the city miss from New Orleans to New Mexico, but he doens't plan any concessions for his charge's delicate sensibilities. Yet when they finally arrived at the hacienda, Jake wants to protect Angela from the shock of meeting Rita ... the beautiful half-sister that Angela had never known existed. And Rita is claiming to be his fiancee! But the sapphire sparks of defiance shooting from Angela's eyes and her breathless fury will challenge his cool indifference - and until the savage western skies kindle their passion into a liquid fire that roams out of control.