The Hidden Queen - by Jessica Sturtevant

In the frozen kingdom of Tachá, the Huntress Queen dreams of murder. 
Each night, Valérikka Vargsson sees herself strike down her beloved husband, King Ragnar, and each morning she wakes in terror. 
When a seer reveals the vision is no dream but prophecy, Val faces a choice that could destroy her world: stay and become the weapon of fate, or flee and defy it.