Brimstone's Fire. Ozark Outlaws MC, #19

He walked into her barbershop for a haircut. He walked out ready to kill for her. Lena Marsh has been fighting alone for five years. When the man who murdered her firefighter husband gets out of prison and sends his soldiers to finish what he started, she's got nothing but a baseball bat and the desperate need to protect her eight-year-old son. Brimstone didn't plan to claim her. As the Ozark Outlaws' enforcer, he's spent years channeling the gentle patience that once comforted dying hospice patients into something far more lethal.
But when he watches her stand at her window with a bat, ready to take on the world for her boy, something inside him decides. She's his. Now Lena's under his protection whether she's ready or not. She's sleeping in his cabin, wearing his patch, and making his brothers wonder if the quietest man in the club has finally found something worth breaking his silence for. But the militia leader hunting her has forty armed men and six years of hatred sharpened to a killing edge.
And when the war comes to the compound gates, Lena will have to decide: hide behind the man who's claimed her-or fight beside him. BRIMSTONE'S FIRE is book 19 in the Ozark Outlaws MC series. No cliffhanger. HEA guaranteed.