Lightning Storm by Grace Brennan

Ana’s life hasn’t exactly been a fairytale—a horror story would be more accurate. She’s been beaten down, every shred of confidence and self-esteem stripped from her, yet still, she fights on. Only now it looks like her past has caught up to her, and she’s poised to make her final stand against the evil that stalks her.
Bolt is content with his life, his only worry for his next mission with the Dark Leopards MC. But everything changes when he meets his curvy Ana. He knows immediately that she’s his mate, but she’s wary and skittish of men. And it doesn’t help that in order to save her, he has to put her right in the middle of a group of rough and rowdy bikers.
Bolt thinks Ana’s fear of men is what he has to conquer—but he doesn’t realize the extent of the damage her ex did. He’s ready to go to war to win his mate’s heart, but how can he triumph when the one person he has to defeat is the very woman he’s trying to save?