The Alien Chief’s Bargained Bride by Dominica Bolden

Mallory Delour would do anything for her little sister, Stephanie. So when a genetic disease threatens her sister’s life, Mallory is left with only two options:
She can go into crippling medical debt to delay the inevitable, or she can become an alien’s bride with the assurance that Stephanie will receive life-altering gene therapy.
For Mallory, the choice is easy….
But for Alek’dar, it isn’t.
When the humans approached him, he’d been wary. But, by taking them up on their offer, he can kill two birds with one stone—a bride for him and an alliance with the humans.
Happiness hasn’t been factored into their decision but that doesn’t necessarily mean they can’t find it.
Unless someone, or something, stands in their way.