His Human Possession: An Alien Warrior Romance - Zandian Masters, #8

He doesn't want her to offer. He prefers to take. Demand. Conquer. Leti only intended to seduce the alien warrior. Because the game was to survive. Ingratiate herself to a new master. She never thought she'd fall for the giant horned warrior who rescued her from slavery. But it's easy to make him lose control. All she has to do is tempt him, and his need to master her takes over. Paal's species battle to take back their planet.
All of their futures dangle by a thread. Leti and Paal should cling together as they fight for freedom, but her every seduction drives a wedge between them. And when he learns her secret, it just may be the end.