What is Maria's advice to Bruno after their talk?

Maria gives some advice to Bruno to 'keep safe' by telling him to 'Just keep quite about it, Bruno. Don't you know how much trouble you could cause'. This shows that Maria wants the best for Bruno and that she wants him to be safe as seen through the fact that she, who is meant to be there 'slave', is giving him advice. I think that it is good advice for Bruno because it shows that he needs to be good and it is a good foundation for principals about respecting elders and there decisions.