Leila Montgomery is in trouble. When she comes clean about her secret meeting with action star Cade Wallace, her boyfriend, billionaire Jacob Whitmore, is furious. After finally getting past Jacob's walls, Leila must regain his trust while thwarting Cade's efforts to woo her. But Jacob has a secret that will shake the very foundation of their relationship and define their future... The Billionaire's Secret is part six of the His Submissive series.