Farin the Dark by Kelly Lucille

Twenty years after Sara, the first compatible Tellox mate was discovered on Earth, a new generation has come of age.
Farin the Dark, High Commander of the Tellox warriors, has brokered a deal with both the quickly adapting government of Earth and the planets of the intergalactic Alliance for the right to test females for bonding compatibility with his warriors.
The Tellox Accords, as they came to be known as, gave the Tellox hope for lives that consisted of more than just battle and endless wandering. Between the Accords and the coming of age of the first females to be born Tellox in thousands or years, there is new hope for his people.
But what happens when a warrior sets his sights on a woman who is not bound by the accords?
When you are Tellox? You go hunting.
Ember, Siren of the Trios, is no easy prey. Her manipulated genetics and hidden past guarantee that she is as dangerous as she is alluring.
Now a past she thought she had destroyed is catching up with her, and her present if full of danger and the allure of a pushy High Commander she is not sure she wants to escape.