Tank by Erin Bevan

Tyler Wilde moves to Black Widow, Texas, to join the Blue Guardians, a local biker club that helps abused women and children. He’s intent on starting his life over, but a small piece of his past collides with his present when he runs into the local waitress, Annie Carter.
Annie’s the girl of his boyhood dreams, and Tyler can’t wait to get reacquainted with her. Only problem is, Annie’s engaged. But what has Tyler more troubled than the diamond on her finger is the bruise that graces her arm. To make matters worse, Annie’s abuser and intended husband is also the town’s Chief of Police.

Tyler is determined to offer Annie a safe haven, but she refuses his help until her life is hanging by a thread.