Misunderstood

Xavier has a secret. A secret that no one but his twin sister and his four cousins know of. He is a shapeshifter , being able to turn into a wolf at will and even shift partially. He is also the third in command in his alpha pack, which his sister is the alpha of. He and his pack have been traveling around the world helping other packs with random attacks.
But when he returns to his hometown and comes face to face with his mate, who has recently mated with another alpha a few days before, he has that if you love something, you have to let it go.

Love, Be Afraid because This Might Hurt and you're gonna have to Trust The Instinct before You Lose Your Mind and Can't Go Back.