Courted by Beasts

Can you beat monsters without becoming one?

Despite our best efforts, my devoted monstrous men and I have fallen into the clutches of one of our most powerful enemies. But the demon strikes a deal with me-our safety in exchange for my cooperation in a mysterious scheme.
It turns out he wants me to tap into magical powers more vile than the brutality I've faced from his kind. With my family and the men I've fallen for on the line, playing along may be my only chance at survival.
But as we search for a way to win our freedom for good, the danger grows greater by the day. I'm running out of options.
To defeat the villains who want to claim me, will I have to turn into one myself?