Written In The Stars Book 2 of Katiah Trilogy

Brehan Tucker's recurring blackouts and bouts of temper set the crew of the Stellar on edge and further distance herself from her estranged husband, Erth.
Not only must she battle her inner demons, but suffer the wrath of Erth's half-brother, Zanus-Roul, who has declared war on the Syres and Humans for entering his domain.
Too late Erth realizes he has been snagged in a cunning trap. Within Brehan resides Di'me, a spawn conditioned to not only destroy the Earth women and the Syre men he raised from infancy, but himself and the Guardians of Haveth.
Love wielded a shield of denial.
Now it must serve as a sword of justice.