The Bone King and the Starling by Elizabeth Stephens

They call him the bone king.

A massive, beast of a male who worships the gods and is all too willing to provide them their sacrifices. Human sacrifices. He and his warriors have come to visit Winterbren, a poor little village on the outskirts of Wrath and my home.
I’ve never been more grateful to be a thrall, for my low status will ensure that I remain outside of his notice. But when he requests — nay, requires — a willing female to warm his furs for the duration of his stay, his selection falls to me. All I can do is pray to the gods that I survive the night…
And beg the bone king for mercy.