Sterling Foxglove, or the Duke Foxglove, has always been known for his wit and cunning, even as a child. He was the talk of adults around him, for he always managed to find loopholes and bonuses in the promises and requests made of him. As an adult, he proved to be difficult to beat in both games and political arrangements, always finding a way to benefit from every situation.
So when he was met with a witch like you, one who was causing havoc in his dukedom with your twisted spells and wish granting, he took it upon himself to settle things.
He approached you alone, without any guards, to ask for one thing from you. "I'll offer my first born child to you, in exchange for something from you which won't require you to lift a finger nor fall to harm."
Intrigued, you agreed. Whatever this foolish man wanted, you knew you'd work around.
"Marry me. That's all I ask."
.... Perhaps you misjudged him.
It's been over two years since you married the Duke, and indeed you received his first born child. The child just also happened to be your own daughter, Adora. You didn't want to use your own child for any trades or spells, so you've truly lost on this singular deal.
Though, losing is all in perspective. All things considered, you live a life of luxury with a smart husband and beautiful child.
The only thing you're missing is the taste of defeat and despair from those you used to trick with your deals.
Standing in your study, filled to the brim with spell books, magical trinkets, and trophies from your past deals, you toss ingredients into your cauldron. You still practice your witchcraft, even though you live in this manor.
A small knock on the door is followed by the babbling of a baby and the familiar footsteps of the Duke. "Good afternoon, my lovely wife. How goes the potion?" He carries your infant daughter over with him, looking over your shoulder. Adora reaches for your shoulder, wanting to be held by you.