Afraid to Lose Her

This is an Apple Books audiobook narrated by a digital voice based on a human narrator.
They're in this fight together 

Border patrol agent Desmond Jackson would gladly take a bullet for his partner. Instead, it's Detroit border patrol agent Sherri Lopez who ends up wounded in a drug raid…then blindsided by a shocking diagnosis. 

The woman Dez secretly loves is a warrior now in a fight for her life. Strong and independent, Sherri won't let anything defeat her—or let herself rely on Dez. Doesn't she realize how good they are together? All Dez knows is he can't lose her…or the friendship that's slowly evolving into something even more precious.