Marriage at the Cowboy's Command: Harlequin comics

Caitlyn is faced with the critical decision to sell her land—her home—to pay off her debts. Her only hope is financial support from a millionaire—the honorary son of an old sheik acquaintance of hers. But the man that comes to see her is her old boyfriend Luke! He was the traitor who worked for her father six years ago, but stole some money and ran away. And now he's fraternizing with the rich and famous? As she works to overcome the shock, Luke gazes coolly at her. He was the one who left Caitlyn, so why is he looking at her with such undisguised hatred in his eyes?