The Unforgiven — Joy Nash

Seven thousand years ago, angels descended from heaven to guide a fledgling human race. Known as the Watchers, they were forbidden to partake in carnal pleasures. But they could not resist the temptation, and as a result their descendants have been cursed -- unnatural magical beings that belong neither to heaven nor fully to earth.

Cade was ordered to claim her for his clan. She was becoming one of them-- a Watcher, so to reach her full power--and she didn't even realize it. Yet the moment he saw her, he knew he could never share her. No matter what demons lurk in her past, no matter howw much she tries to deny her body's burning need for his, he will claim her for himself. And together they will face the battle that is brewing...