Once My Mate, Always My Mate

I lost you once, I won't lose you again. My name is Sabrina and I am the moon goddess. I have a chosen mate by the name Xander and a true mate, chosen for me by the fates and his name is Aiden. When I finally think I have a chance at love again with Alpha Xander, I lose Aiden to my sister, Josey's lover. Cayden, the vampire king has taken residence inside my true mate's body and I have to find a way to release him and save my mate before it's too late and I lose him for good...... Will Cayden go down easily or will I have to fight him? And will Josey help in saving Aiden or will she lose her mind once again, falling under Cayden's spell once more? Failing to help me and running off to be with her lover? Only time will tell....