Daughter of the Dark Sun by D. Kathleen McAteer

Cursed by the Dark Goddess, Apattar desires only one thing in life: to make the world feel her pain. Trapped in a remote oasis and abused under the guise of “purification” by her father and a society entrenched in superstitions, she knows she is unlovable.

Until he looks at her.
Now, she will not stop hunting her prey.

After witnessing the brutal murder of his parents as a child, Therat struggles to contain the dark voices in his head. He clings to life but yearns for death. When he sees a raven-haired woman cloaked in the Shadow-weave, she becomes his unwilling obsession. As the siren’s song pulls his darkest urges to the surface, one thing is clear: she will be his ruin if he cannot find an escape.

She is the Maiden of Shadow, the woman in the night who sends men to madness with just one look.
She is the Coming Reckoning, the cursed Daughter of the Dark Goddess sent to ready the world for Death Herself.
She is inevitable.

Burn it all, for him.