Bred by Her Alien Abductor

Ella spends her days studying rocks. It's not glamorous work, and her funding is next to nothing, but she hopes to prove life exists beyond Earth. What she doesn't count on is being used as a breeding vessel to save an alien race. She's kidnapped and taken far from Earth for only one purpose. She tries to revolt but it's hard when her captor does such wicked things to her body.
Dhiro travels to Earth to find a fertile mate. The future of his planet is at stake, so failing is not an option. He's never met a human in the flesh, but his studies conclude they're a primitive and violent race. He's pleasantly surprised when he finds a female soon after landing. She's lush, in touch with her emotions, and will make the perfect mate for him.
There are others on Dhiro's plant with fertility issues. Can he keep Ella safe when they try to take her for themselves? And will their union even save his world at all?