Oceans of Fire by Christine Feehan Drake Sisters Novel

As the third daughter in a magical bloodline, Abigail Drake was born with a mystical affinity for water, and possessed a particularly strong bond with dolphins. She spent her entire life studying them,learning from them and swimming among them in the waters off her home town of Sea Harbor. Until the day Abby witnessed a cold blooded murder on shore and found herself fleeing for her life~right into the arms of Alexsandr Volstov. He's an interpol agent on the trail of stolen Russian antiquities, a relentless man who gets what he goes after~and the man who broke Abby's heart. But he isn't going to let the only woman he ever loved be placed in harm's way~or slip away from his embrace.