Lethal Beauty.

Raegan is a human. That is until she is abducted and injected with a serum. She has become a siren/sucuubi hybrid. The people who kiddnapped her made her the ultimate assasin.

Nikolai is an Alpha. He has been looking for his mate. What happens when Raegan next mission is to kill alpha Nikolai? What happens when she turn out to be his mate