Possible Clues:

• Adamant refusal
• Preceder of 'And that's final!'
• Bit of doubling down from a parent
• “Don’t ask again!”
• "To repeat ... forget it!"
• Parent’s exasperated refusal
• 'Don't ask me again!'
• Exasperated parent's reiterated refusal
• Refusal to a repeated request
• Stern parent's reply