She was caught up by two lives at once... "Would you do your sister a good turn? " Karen Greer had asked Gail Branstead, the twin she hadn't seen since birth, to step into her shoes for a couple of weeks and experience the exciting life of a model. Had there been anything to the alleged telepathic communication between twins, Gail would have sensed danger. But then, she wouldn't have met Luke Prentis--nor deceived him, either. She appealed to Luke--on two entirely different levels, as two different women: the uninhibited siren and the gentle woman he loved.