The Island Bride (Harlequin Romance #2257)

He was the last man she'd wanted to meet Cara Vernon's joyous return to French Polynesia had been spoiled: Pierre had come back too. Life would be very akward if he, now the island's most influential man, revealed they'd actually met for the first time six years before, when he had been forced to marry her-a teenage runaway he'd found hiding on his banana plantation. Fortunately Pierre didn't recognize her, and Cara decided not to jog his memory. but her silence had unexpected results!