To Win His Heart

Question: a beautiful, bubbly blonde heiress, Olivia Duchess, has made it perfectly clear that she's attracted to Luc de Falcon. He's attracted to her. Only he knows that his brother is infatuated with her. Only he knows that his brother is infatuated with her. What should he do? Be honorable - bow out and leave them to it or, if she has no interest in his brother, then Luc would be a fool to walk out out the love of a lifetime...