Caged with the Alien by Luna Kingsley

Will she be the one to lure the beast from the darkness?

Galak, once the proud leader of his tribe, has become one with death and pain. They call him beast, and he’s earned the title. Living in a cage, being forced to fight to survive has made him the worst version of himself. Most nights, he wonders if he’ll ever find his way back again.
Then she appears, dropped into the middle of the combat pits.
He’s given an order to impregnate her or face the consequences. But he’s Roh’ilian and they don’t hurt women or take what isn’t given freely. Even the beast within won’t allow it.
Emerie, desperate for money, arrived at a research organization to participate in a medical study. With zero family to lean on, her back is against the wall. Instead of the pills she expected, she wakes up in a strange place surrounded by creatures from science fiction novels.
She’s given a choice: submit to the beast or be passed from cage to cage until she gives her captors what they want – a successful mating between a human and alien species that results in a child. But Emerie just wants to go home. Even if there’s nothing for her to go home to.
She’s seen the beast’s incredible power firsthand. She also sees how he looks at her. If he wanted to, he could take her without question. Instead, he surprises her. Is it possible the beast has a soft side? And how far is he willing to go to make sure she remains unharmed?