Alpha's Fake Matebond

Werewolf romance where the protagonist's fated mate, an Alpha, has begun favoring his mistress Vivian and lets her act as Luna for a time. To make that possible, he claims the bond between him and his true mate has broken, leaving her to face the humiliation of being set aside in her own pack. The heroine must decide how much of this betrayal she can endure and how to stand up for herself while the Alpha's lies keep piling up.