Cowboys Don't Have a Fake Marriage with Their Best Friend's Sister

She's his best friend's little sister.He's never noticed her. Not like that.He needs to marry to inherit his money, so he's hired a woman to be his fake bride. Only he's too sick to get married. Now he's confined in his small house with his fake fiancée-to-be and his best friend's little sister. The ladies don't seem to get along. And one of them isn't what he thought.Should he follow the plan, or follow his heart?