Dragon Prince’s Mate by Leslie Chase, Juno Wells

Josie
Josie Conner always dreamed of going into space, so a job as a technician on a Mars colony was the chance of a lifetime. She looked forward to walking a fresh world, to solving its mysteries — but she never expected to wake up an alien, asleep underneath the planet’s surface.
And she certainly didn’t expect the alien to be so…incredibly hot.
Verikan is tall, intimidating, dangerous, and the way his violet eyes look at her makes her heart pound. Josie soon discovers that this bossy, demanding alien doesn’t intend to let her go…but the closer they get, the less Josie minds being his prisoner.

Verikan
Prince Verikan survived the fall of his civilization in stasis deep beneath Mars’ surface. Now the dragon shifter and his guards are all that remains of the Dragon Empire that once ruled the stars. His duty demands that he rebuild the empire that is his birthright, and that requires conquering more worlds – starting with Earth.
But the moment Josie rescues him from his long sleep, he knows that the beautiful, curvy human is destined to be his mate. How can he start his reign by attacking her homeworld?
When Verikan’s advisors force his hand, the dragon prince must choose. Will he save his empire at the cost of breaking her heart? Will he sacrifice his people to spare her? Or can he and Josie find a third path to save both their planets, and their love?