Behind the Uniform — wife-by-night-maid-by-day

So this is the feared Wolf King of the North, Kaelin, my spoiled stepsister's new husband. And tonight, I'm the one taking her place in his bed. Cecily, is that you? Stay calm, Lillian. If he finds out you're dead...

Miss Cecily, I beg you, save my mother. She's dying. Of course, my poor little sister. I might even save her. But first, you're taking my place in Caelan's bed tonight. What? Are you insane? Alpha Caelan is your husband. Tonight is your wedding night. You don't get to ask why. You do as you're told.