(Wait for modification) Although the activity space is limited after entering the castle, they were invited guests. Even if they "lost their way" inside the castle, it shouldn't be too big of an issue. However, it's another matter with this maid following them.
This was a notification, not a discussion. After the butler finished explaining, she left, leaving the young maid in the lounge. She thoughtfully poured tea for them and even asked if they needed any reading material to pass the time.
After waiting for half an hour, Xiao Si noticed that no one had come to inform them yet, so she suggested they take a walk outside.
"Can we go to other places?" Yan Jiayu asked, "Didn't the butler say we could only walk around near the small building?"
Xiao Si smiled gently, "The butler is rather strict, always abides by the rules, but the queen is a very kind person, gentle to everyone, and is happy to let people tour her decorated castle."