Final answer:
The voice of Oliver's mother affecting his decision to write the check is not mentioned in the given information.
Step-by-step explanation:
The statement in the question, which states that 'The voice of Oliver's mother in his head almost makes him stop writing the check for the Duchess,' is not provided in the given information. Therefore, I cannot determine if it is true or false. Please provide more context or information for me to provide a proper answer.