3. Millie Bobby Brown needs a new roof on her house. She requests bids from three contractors. Ain't No Roof High Enough submits the lowest big for $3500. Ain't No Roof begins the job by removing the entire old roof. They then told Millie that she would have to pay them an additional $1500 for extra labor. Millie was afraid that all of her clothes and furniture would be ruined if it rained so she said she would pay the extra money but never did. Ain't No Roof led a lawsuit against Millie for the $1500. What is Millie's legal best defense in this case