Sinister Engagement by Lucy Smoke

He was given a choice: my sister or me.
He chose me.
Gaven Belmonte is one of the most dangerous hitmen in the world, and I’m the daughter of one of the richest mafia families in the country. In exchange for my hand in marriage, Gaven Belmonte is about to become the next head of the Price family.
I’ve always tried to shun my family’s past and their filthy ties to the underworld of organized crime. I don’t smoke. I don’t drink. I’ve never even had sex. I just want to be free, to be normal. Gaven could do more than just ruin that dream—he could completely annihilate me.
It doesn’t matter that I’ve been planning to escape my family’s criminal past ever since the murder of my mother. What my father wants, he gets, and it appears the same is true for my new fiancé. He wants me, and he’s about to get me. To have and to hold. Til’ death do we part.
We’re a match made in hell, but the contract says that he owns me, body and soul, and he intends to make sure I know it.