I do not consider that a dumb question at all. The general public knows nothing of Model A's and we do little to remedy that beyond copping an attitude about how dumb they are.
Unlike later cars, Model A's had no body style badges, like "Victoria", "Fairlane", "Thunderbird". She saw what appeared as a fancy old car with bling (Shiny metal trim) not found on modern iron. Seeing only 'Ford' marked on it, I can understand her associating it with Ford's later bling model, the T-bird.
Never a dumb question, I would have taken the query as a lead to explain a brief bit about Model A's.