Alien Shifter Force: Aron

This is an Apple Books audiobook narrated by a digital voice based on a human narrator.

As if saving earth isn't hard enough, try resisting a smoking-hot alien warrior at the same time. 
That's the challenge facing United Earth Forces soldier Athena Diaz. She and her small squad are racing to find the alien invaders who vaporized most of earth's population. So why can't she focus on the mission instead of daydreaming about her Dreon partner's rock-hard body?

Dreon warrior Aron couldn't believe it when his commander felt the mating call to a human. He's even more shocked when the same thing happens to him. But it has. United Earth force soldier Athena is perfect in every way. Except one: giving in to his desires and mating with her could mean sacrificing the most important war of his life.