Answer:
I do not have access to the specific beliefs and thoughts of individuals, including "Mummy," as it is a vague term that could refer to any person's mother figure. Therefore, I cannot provide a definitive answer to this question.
However, in general, there could be several reasons why a person might believe that Margot, not Peter, should be allowed to read books for adults. For instance, they may believe that Margot is more mature or intellectually advanced than Peter and can handle the content better. Alternatively, they may think that the adult books have themes or ideas that are more relevant or interesting to Margot than Peter. It's also possible that they believe Peter is too young or immature to understand the content or may be negatively influenced by it. Ultimately, the reasoning behind the belief would depend on the individual's personal values, opinions, and perspectives.
Step-by-step explanation: