Given this, I feel like there's something you're ashamed of or anxious of revealing to your mom. You've had instances before where your mom has acted in this way. Are you young? Or afraid of having your autonomy taken away?

The rash decision to kill the doctor and eat him seems like an exaggeration of a desire to be in control or have others acknowledge you, somehow. As in like, you are an adult / can take care of yourself. Or something.