How many times had she imagined having a Crown on her head? Perhaps when someone mentioned the name of Queen Elizabeth, maybe just dreaming of becoming a princess in a fairytale?
The dream was coming true because Adaline was staring at the Crown that she was supposed to wear as the Queen of the shifting realm.
She had not received one but two.
Apparently the previous king, the predecessor of Xavier, who was his uncle Nicholas had made his wife two crowns.
Adaline was told by Jenna that there were two reasons for it. One reason was a general one that a queen can have as many as she wanted but the main reason was, since she came from a poor upbringing Nicholas wanted to shut everyone up who talked about her upbringing by making sure that she always wore Crown.