Carnal Secrets by Suzanne Wright 

Half-shifter Shaya Critchley may hold a submissive role in her pack, but she’s done taking orders. After her Alpha wolf mate refused to claim her—but committed to interfering in her life—she took off. Now she hides from him, posing as a human in a town full of anti-shifter extremist groups. She thinks he’ll never find her again, and that suits her just fine. But she’s wrong. Nick Axton can barely control his feelings for Shaya, but he could never claim her—not if he truly cares for her. The degenerative brain condition..… Read more.