Twin of Ice by Jude Deveraux

In Chandler, Colorado, every man dreamed of winning Houston Chandler and her twin sister, Blair. But for Kane Taggert, a rugged stranger with dark eyes and new money, Houston was the lady he vowed to make his wife.

Beneath her gracious mien lay a woman of hidden passions and surprising secrets... yet she was shocked by his brash proposal of marriage. But her defenses melted at the first touch his hungry lips on hers. Kane has always gotten what he wanted. Now he wanted Houston.