The Iron Fae by A.K. Koonce

Life isn’t a fairytale.
Prince charming doesn’t exist.
And I’m not a queen.
Instead I’m stuck in the iron kingdom with a demented prince, and what lucky role do I get in all of this: Sex toy for his royal highness. That’s the regal title I get: Play thing for the Iron Prince.
It’s the safest thing for me though. Because Cordelia is searching for long forgotten secrets. If I’m not careful, she’ll know what I’ve been hiding all along.
She’ll know that I’m coming for what’s mine and I’ll take her down with me if I have to.
Because I am the Mortal Queen.
And she’s been wearing my crown for far too long.