Demon’s Destiny by TW Knight

Garrett Duex Sabres is handsome, wealthy, brilliant and a demon with a split personality feeding on the living energy of humans. However, unlike others of his kind, Garrett chooses not to feed off pain and misery, he’s discovered a more palatable and just as potent source—sexual energy. Exploiting his charms, Garrett spends many evenings moving from one “dinner-date” to the next siphoning off small amounts from willing playmates. When Kay walks into Garrett’s life, his entire world is flipped around.
Kay Piper Jordan had once been held captive by a demon leaving her scarred in body, mind and spirit. Now, nine years after her escape, she is homeless, hunted, and still wondering exactly what the demon, Border, had intended for her. When Garrett rescues her from Border’s servant she finds herself conflicted. Garrett isn’t at all like the other demon, in fact he seems to be highly over protective of her—even form his other, darker, personality Taledrin.
Taledrin lives less than a half-life. For just one week a month his other side gives him control. Unlike Garrett, Taledrin likes a little pain with his pleasure and cruses the seeder clubs for his “dinner dates”; or fights whoever he can just for the thrill. But once Kay enters the picture he finds himself curbing his natural tendencies. He begins to care, even vying for her attention. No matter who wins the battle for Kays heart one thing is clear, both Garrett and Taledrin must work together to keep her safe and out of Borders hands.