Fierce Alien by Luna Kingsley

He’s forbidden from claiming her.

Lana is thrilled to be on Xavren, even after everything they’ve endured at the human settlement. No one knows how bad it was for her at the religious compound where they lived on Earth. Not ever her sisters.
She’s become so good at keeping secrets. Until she meets the barbarian with the searching brown eyes and quiet, watchful ways. With him, she can’t hide anymore.
Dhacar is devoted to his clan and faithful to his leader. So when he’s put in charge while Brotak is away with his mate, he takes protection detail seriously. Especially of one particularly appealing human.
He’s been warned to keep his distance. She’s too young, too fragile. But to him, she’s too tempting to resist. Somehow, he’ll find a way to claim her, breed her, and defend her from the dangers closing in on the clan.