Merciless Vows by Aidèe Jaimes

He wanted my innocent sister to become his submissive bride. What he gets instead, is me.

Forcing my father into a debt he cannot afford, the ruthless king of the Sinacore Mafia demands my twin as payment. A sweet prize to hang quietly on his arm. But when she runs away in fear, it’s up to me to save my father from certain death by sacrificing my freedom to a beast who has no idea I’m not the bride he bartered for.
There’s a reason he wanted her and not me.
I am not sweet. I am not weak. I bite back.
When he realizes who I am, he promises I will pay for my deception. That he will bring me to my knees and make me beg. That I’ll love every minute of it. And before long, I’m left wondering if I really want the fire raging between us to destroy him in the flames…
or if it was the punishment I was after all along.