On Azrael’s Wings by D. Jordan Redhawk

Ursula, a seamstress's slave, survives the brutal attack on her village by the King's Butcher, General Azrael of the Third Army. Due to circumstances beyond her control she's thrust into the role of body slave for the infamous woman, and must learn to please her new mistress in all ways or end up on the slaver's block. Azrael only wishes to retire at her estate, but her king has other ideas. In fact, King Shonal has many ideas Azrael cannot abide, and one of them has to do with demanding sexual favors from her newly acquired body slave...the one she's unaccountably fallen in love with.