Wicked Dreams by Ally Vance

Even the most vile of nightmares are born from the sweetest of dreams.

Miles tempts me in a way no other has before; he’s no idea of the truth that lurks behind the handsome face of his dream lover. I’ll bide my time until I’m ready to reveal myself. Only when Miles is weak, compliant, and willing to sign his soul over to me, will I show him exactly who and what he’s given himself to.
I’m not often tempted to cross the boundaries and physically enter this world. When I do I feast until I’ve had my fill, extracting every delicious morsel of my lover’s pleasure and pain as I bend them to my will. I know what will happen if I manifest in their reality, what they’ll see…

Nightmares are just the blurred lines between dreams and reality. Sooner or later your demons are going to get you.