Syndicate of Sins (Toxic Paradise, #2) by Marie Maravilla

The problem with caging a predator? Someday, they may get out…

Bastard. Daughter of a traitor. To my uncle, the Italian Don of New York, I’m nothing more than a tool to be wielded. My obedience is the price I pay for my father's sins. But the Mafia should have worked on gaining my loyalty, because the chains they shackled me with have been broken...change is coming.

New York has always been run by The Four Families: Italian Mafia, Irish Mob, Russian Bratva, and the Jirocho Yakuza Clan.
An alliance cloaked in proclamations of peace, while knives are held to each other’s backs. But a new player has emerged—The Syndicate. Three men born of the same blood as the kings they aim to conquer. These second sons think they can use me the way my uncle did, but they’re in for a rude awakening. I’m not a damsel in distress. A blade has been in my hand the entire time, and I’ve been waiting to land the blow that starts the bloodbath.