Sins of the Flesh — Debra Dunbar

The Hawaiian Islands in spring should be a romantic paradise, but along with rekindled passion Amber and Irix discover a magical spell gone horribly wrong. Two sex demons could set Maui aflame with desire, but there's another creature with a more lethal inferno planned. Defeating it and saving the island will take all of Amber's new found powers, as well as the help of friends new and old. Especially since there's more to this enemy than first meets the eye.