Her Brutal Bodyguard by Jenna Rose

Gunnar Jones is one of the toughest men on the planet. And after a terrifying, life-changing event in a dark alley, Gina somehow manages to get the middleweight mma champion of the world to train her in self-defense.
But there’s more to this bad-boy than Nina knows, and it’s not long before his troublesome past is putting their future at risk, and his role as Nina’s protector could be putting both of their careers at stake.