Blood Reign — L. Shannon

Sadrina would give anything to protect her son. She chooses to sacrifice her freedom and bargain her body to the lord of hell, returning to the arms of the one demon she's always loved and the place she fears the most.

Pahele has no intention of sacrificing his lover. Instead of a slave, he expects her to become his queen. But to prove her right to rule at his side she must complete tests including passing judgment over the most notorious of her kind -- her father, Sadaen.