So I can be rude. Often my grandmother will ask me something and I'll snap back an answer. For example five minutes ago she asked me if I wanted her to get up early to make me cinnamon rolls. She had already taken her sleeping medication and was stumbling when she came to ask me this.
Me: "No."
Her: "Are you sure?"
Me: "Yes."
Her: "Now I don't mind making them for you."
Me: "I said no."
Her: "How about I make them for you Saturday."
Me: "If I tell you no, I mean it. I don't like cinnamon rolls and I'm on a diet. Thank you but no thank you."

I basically have to say 'I said no', for her to leave me alone about things like this.