Flying Pancake Battle

I sell flying cakes in the Middle East, using ancestral cryptography, and earning blood-stained gold. Until I rescued a princess in distress, she was cute and clingy. Later, my mortal enemies died suddenly one after another, and the way of death was exactly the same as the flying cake recipe I taught her. On the night of the flight, she took off her disguise and put a gun to my chin: "Teacher, the last lesson - how to use what you taught me to kill you." (I smiled and held her hand holding the gun: "What a coincidence, this is exactly what I want to teach you.")