There's sin, and then there's literally going-straight-to-hell sin... Being in lust with my dead brother's wife pretty much guarantees that one day I'll be the devil's bitch. But Eden Gordon works with me, so it's getting harder and harder to stay away. I promised my family—and him—I would, though. My days as an MMA champion are behind me. But whenever I see her, with those wicked curves and soft mouth created for dirty deeds, it's a knock-down fight to just maintain my distance. "Hard Knox" becomes more than just the name of my tattoo shop. However, surrendering to the forbidden might be worth losing everything...

Blackballed from my job. Moved back to my hometown with my tail between my legs and family issues crushing my back. Slinging drinks in a dive bar. Yes, the past year has been hell. So when a man who’s temptation wrapped in golden skin and sin offers me one night of no-holds barred, dirty sex, I’m all in. I deserve it. But now those few unforgettable hours have me facing blackmail from my own father: He'll pay for my mom's medical bills, but only if I never again touch the man who has quickly become my obsession. Because the man? My obsession? He’s my stepbrother.