Let Love Rule by Jacqueline Simon Gunn

Will Easton had been running from old wounds for too long when a tragedy sends him to his hometown, offering him the opportunity to revisit his past and learn to trust again. Once back at graduate school, he vows to take more risks, especially with his heart. When he meets Rachel, he is immediately drawn to her. But there are two problems: She’s still married, and he feels an obligation to his on-again/off-again girlfriend who stood by him. No matter how much he wants to be loyal, he feels a strong pull toward this new woman.

Rachel Dale finally found the strength to cut the cord to her cheating husband. When she meets Will, she finds herself irresistibly attracted to him. But he appears to have a girlfriend, and she refuses to become the other woman in someone else’s story. Besides, learning to trust another man is going to be hard. Trusting herself and her judgment after her husband’s betrayals is even harder. Meanwhile, her soon-to-be-ex is not letting her go easily. He could destroy any chance she and Will might have… if he ever leaves his girlfriend.

As Will and Rachel struggle to make the right choices, they both learn that saying they’ll trust again doesn’t mean it’ll be easy. In this complex, psychological romance, the most important choices are the ones that break the rules.