Little mermaid

Do you have the guts to sleep with a sex spirit?
They say that they will give you protection and much more and the only thing they need in return is sex with a young beautiful woman.
Cassie Black is an ordinary girl who could never think of entering such an arrangement, but when horrors from her family's past threaten her life and the lives of her loved ones, she needs protection to discover the truth and make things right.
The pleasures of sleeping with an incubus are addicting and otherworldly until she discovers her night visitor has a personality that revolves around more than only sex. Will she be able to remove the threat in her life? Or has she only created another problem by getting a secret night lover?