Broken Bonds by Brit Vosper

Olivia:
I’m a fighter. A murderer. I have to be.My father heads The London Crime Syndicate. And rules me. My choices are not easy.When our shipment was stolen by Marcus, my father’s biggest rival, I had to kill the guy he framed for it. As that played into his hands, I was kidnapped by his sadistic trainer, Aaron. Used as a ploy by the only faction dangerous enough to bring down my father. And the Syndicate. My only option is to fight.But nothing is ever clear-cut.Aaron likes it when I fight. And that dark brute of a man thrills me as much as he hurts me. How much more pain do I want to go through?As the tangle of lies unravels, and my family’s secrets are revealed, I’m faced with the hardest choice of my life.I’ve killed for my father, but can I kill my father for him?

Aaron:
Find them. Break them. Sell them. That’s how it goes. Or how it did.I thought Olivia was nothing more than good-looking leverage. Valuable stock. A ploy for Marcus to get revenge on her father and a sweet price tag for me.
But it’s not so clear-cut, anymore.I’m discovering there’s a lot more to Olivia than a pretty face and a body bred for sin. She’s smart. Rebellious. She has a fight that stirs my darkest instincts. A fire inside her that begs, yet, refuses to be tamed. And I’ve no choice but to try.

I’m discovering there’s a lot more to this story than boy takes girl, boy sells girl. How far is Olivia able to go?