God of Pain (Standard Edition) - (Legacy of Gods) by Rina Kent (Paperback)

I made a terrible mistake.
Being a mafia princess, I knew my fate was already decided.
But I went ahead and longed for the wrong one.
Creighton King is bad news with a gorgeous exterior.
He’s silent, brooding, and obviously emotionally unavailable.
So I thought it was over.
Until he awakens a beast inside me.
My name is Annika Volkov, and I’m Creighton's worst enemy.
He won’t stop until he breaks me.
Or I break him.

Tropes:
Grumpy MMC x Sunshine FMC
D/s dynamics
Opposites attract
Mafia backdrop