Captor of Her Heart by Juniper Kerry

Hester doesn’t love easily; but the humans of the house in Jahull have earned her loyalty and her love. So when their supplies begin to dwindle, and their lives are at stake, Hester decides to act. Sneaking away in the night, Hester pledges herself as a breeder for the most vicious and deadly alien on Beshtast: the Caane Commander. She will sacrifice herself so that her friends might live.
Larric never meant to draw Hester to his side. His offer of supplies was meant to antagonize an opponent; not to encourage a female to come to his tent. But Hester comes anyway. He knows he should send her home. He knows that keeping her is wrong; it could ruin all the carefully laid plans of his people. But how can he deny the strength of their connection? How can he let her go?