Old Enchantment by Amanda Browning

Night magic.

It had been seven years since Maxi Ambro had been home, seven years since she’d scandalised her family by stealing her sister’s fiancé.

Now the prodigal daughter was back — met both with open arms and open hostility. But no one’s reactions were as condemning as those of Kerr Devereaux. He was determined to make Maxi pay for a debt that went far deeper than those owed to her family.

For her sister’s sake, Maxi had little choice but to go along with his plan to pose as his lover. She vowed it was no more than a game, but Kerr was taking their charade very seriously...