Her Vampire Assassin by Erin St. Charles

She saw more than she should…
For more than a millennium, I have roamed the Earth, a lone hunter killing the creatures that murdered my family.
Until a dark-skinned beauty discovers my sacred mission, but proves impervious to my mind-wiping skills.
Turns out the sassy little human has secrets of her own. Secrets that enable my deadly mission. Secrets that put us both in danger.
When I taste her for the first time, there’s no going back.
I’m keeping her, and when I’m done with her, I will make her crave my mastery.
I will make her crave my bite.