Two mate for the assassin

Girl raised as an assassin goes on the most dangerous mission ever. She has to go to the strongest werewolf pack and vampire clan to find the head hunter/head rouge who is one of the most dangerous person ever he wants to destroy the clan and pack he thinks the assassin lives there.

Alpha of the black blood pack has been looking for and waiting for his mate for five years now. The vampire clan leader has been waiting for his bond for decades now. They both have to work together to keep peace between vampires and werewolves. What will happen when they find out they share a mate.