Claimed By the Krijese by Erin Hale

Kala
All Krijese have known is war. Between battles and the disease that ravaged our population, we have almost ceased to exist. Which is why when newcomers—humans—arrived on our planet, my people stole many of their females to breed. None survived.
I crave nothing for my kit but to live in peace. After a small group of us left our former tribe and created a new village, we have allied with our former enemies to achieve that peace. But then Sorin meets Iris, a human female newly arrived on our planet, and becomes fascinated with her.
He makes no secret of his desire to bring the two of us together. But I cannot give him what he wants—or what I secretly desire—because it is too dangerous for her.

Iris
All I’ve ever wanted is for people to see me. It’s not until I leave Earth for an alien planet and meet a little boy who belongs to a local tribe that I am.
Then I meet Sorin’s father. After hearing how their species murdered humans, he terrifies me. The more I’m around them, though, the more I realize my fears are unfounded.
When Kala offers me a mating of convenience and what may be my only chance at becoming a mother, I accept. Before long, it’s not just the child I want, but also his father. Now I have to convince him love is worth any risk.