Warlord by Cyndi Friberg

When Shivon Roxtin tries to incite a rebellion among the human females on the Outcast planet, she’s sent to the Relentless. The ship’s commander, Warlord Torak Payne, thrives on challenge, so he’s looking forward to taming the fiery human. Still, war with the Sarronti is creeping ever closer, and the last thing he needs is an unruly mate. Tempers flare, and sparks fly from the moment they first meet. Their battle of wills is quickly surpassed by their consuming need for each other, but can they channel the emotional intensity into something constructive before they’re consumed by the flames?