What do you think of me planning to kill the family?
That sounds horrible, what is going on in your head?
I plan to poison them one by one
Your family did nothing to deserve this at all! You are a horrible murderer, you shouldn't kill something as precious as your family, or anything at all! You are going to get caught and jailed for this!
It's a secret, don't tell anyone.
Think of how this will end everyone's life including your own so it cannot possibly solve anything for you.