He hadn't known the name of the woman he danced with at the masquerade ball. Not even after their one night of passion. For millionaire Jack Cartwright never expected to see her again. Then he received a letter informing him of his "secret" lover's name and threatening to expose the fact that working-class Lilly Miller was expecting Jack's child. He was not going to submit to blackmail. And if that meant marrying Lilly, a virtual stranger…let the wedding bells ring.