Tamsin by Catherine Lievens

He was sent to destroy them. Fate had other plans.
Nic never wanted to betray Devon or the Krsnik clan, but he never had a choice, not if he wanted to survive. When ordered to help Parrish infiltrate their village, Nic made a choice that saved lives—and cost him everything.

Now he’s a prisoner and hated by everyone in the Harper Clan.
Except maybe his mate.
Tamsin has never felt anything like the bond he shares with Nic, and he’s not willing to give it up. But how can he trust a Kudlak spy? And if he does, can the clan accept Nic, or will they both have to leave the only home they’d had in years?
Nic is willing to do anything to atone and help the clan, including bonding with his mate to find out more about bonds between Kudlaks and Vila.
Neither of them expects Tamsin to turn into a wolf.
When Nic is captured, Tamsin discovers their bond grants him abilities he never had before, including shifting into a wolf. Will that be enough to save Nic and the clan from Parrish’s claws?