Antidote

The witches and the vampires have been at war for centuries. They've hated each other since the moment Alayna Deveraux, a powerful witch, lost her composure and cursed the drunken man who had harmed a member of her coven to an eternity of suffering and blood-lust.
That was until twenty-two years ago, when a witch and a vampire both broke the rules.
Katia Deveraux has no clue why a witch who was supposed to be dead centuries ago has reappeared and come for her assistance. She's been a part of the coven since her parent's died when she was five, but they failed to inform her what she was capable of.
Now that Alayna has something every existing vampire wants, she needs someone to protect her and the mystical object in her possession.
When Alayna starts to fill in the blanks and things start to crash down around them, will Katia know how to defend herself and save the only thing she knows? Or will the betrayal and the lies turn her to the dark side? She's the most powerful supernatural being to walk the Earth—vulnerable and scared. She has no training and she has no control, but she's determined.
And one way or another, she's going to do what she was created to do.
That is... unless someone gets in the way.