Help me find this book!

Help. I was reading this story about a mafia sister sent to live with an abusive uncle after allegedly killing her parents when she was only 7yrs old. Shes regularly sey up and beaten. Turns out after shes semt back to her mafia brothers that ther right hand man *Kade* was the one who set her up. I cant find the platform i was reading on. Agghhhh also she gets a job at this cafe that has an underground fight club an the guy who owns it has been spying on kade an has everything on a flashdrive