Merciless King: A Dark, Mafia Romance (Dynasty of Deception Book 1) by Ajme Williams

I was born to rule an empire. She was born to shatter it. Now, the girl who vanished a decade ago is back—with a secret that could destroy us both. I just broke an alliance with the most powerful crime family in Chicago. All for Piper Collins—the only woman who's ever brought the mighty Don D'Amato to his knees. She's not the same girl I fell for in high school. She's stronger. Colder. And married to a man who doesn't deserve to breathe the same air as her. I'll tear apart heaven and earth to protect her. Even if it means war with the Rinellas. Even if it means blood on my hands. But when her daughter calls me "Daddy," my world implodes. Suddenly, I'm not just saving Piper from her abusive husband. I'm fighting for a family I never knew I had. Now, as enemies close in from all sides, I'm faced with an impossible choice: My empire or my heart? And when the dust settles, will Piper ever forgive me for the sins of our past? Or will the secrets we've both buried become the bullets that tear us apart for good?