Beyond the Ruby River by Lee Colgin

In Ancient Egypt when the pharaohs ruled the banks of the Nile, Mahu led a simple, if somewhat melancholy, life. Making papyrus filled his days. His needs were provided for, but deep in his soul, Mahu longed for companionship.
Dakarai, born of a demon mother and a human father, craved independence. A young incubus constantly in the shadows of his full-blooded siblings, Daka set out for a new city and a life of his own.
While a starving Daka roams the streets hunting for a meal, the sight of a beautiful man walking alone stops him in his tracks. The handsome stranger is just what he needs to quench his spiraling thirst.
But Mahu turns out to be more than Daka bargained for, and his heart falls for the lonely man.
What betrayal shatters their foundation, can Daka and Mahu find their way back to each other, or is each soul destined to long for the other for all eternity?