Incubus by Celia Aaron

An incubus who feeds off the sexual desires of others, Roth de Lis has never been denied the pleasure of a woman’s body…until now.

Lilah, once a warrior maiden in the service of a goddess, languishes on earth after being cast out from the slopes of Mount Olympus.
Lilah will do anything to return home, including betraying Roth. As she spins her web of lies, Roth begins a slow, wicked seduction that eventually threatens to consume them both. But when Lilah’s deceit comes to light, will their torrid love affair be able to overcome a pact with the darkest of gods?