My Engagement Party Made Me the Mistress

He married my best friend the day he swore to my dying father. For three years I was the other woman without knowing it. At my engagement party, "Who looks like the mistress?"—everyone pointed at me. They took my mother's necklace, forged my father's signature, and erased me. But I built his company's system. When my license expired at midnight, his empire went dark. He begged. I bought his company—his team, not him. His mistress went to prison. He lost it all. Me? I sleep well now.