The theme of the story is actually be careful what you wish for. I know it may seem like an obvious theme but it really is the main lesson of the story. Without thought, Olivia wished for her sister to be able to come back and be with her. It is all she could ever wish for. However, later in the story, Olivia finds herself mad and she ends up wishing that her sister would leave her alone. Realizing what she wished for, Olivia panicked. She believed that to be her last wish so there wasn't going to be another chance to bring Violet back. After speaking to Posey, she found out that she was not wearing a butterfly dress when she wished for Soren to fall in love with her. Therefore, she still had one dress and wish remaining. Olivia knew right away that she would wish for Violet to come back.
If Olivia really did use up all three wishes, she would not have been able to get Violet back. She was just lucky that she was not wearing a magic dress when she wished for Soren. Otherwise, she would never see Violet again because of a wish made while she was angry. For this reason, the theme of the book is be careful what you wish for. Even if you are angry, you might end up regretting what you say later on when you finally realize what you said. The same thing applied to Olivia. She quickly regretted wishing for Violet to disappear and she almost lost her for good. The overall lesson of the story is teaching you to really think about what you wish for. It may seem fun to have wishes but you may end up regretting them like Olivia. That is why you should always be careful what you wish for.
If Olivia really did use up all three wishes, she would not have been able to get Violet back. She was just lucky that she was not wearing a magic dress when she wished for Soren. Otherwise, she would never see Violet again because of a wish made while she was angry. For this reason, the theme of the book is be careful what you wish for. Even if you are angry, you might end up regretting what you say later on when you finally realize what you said. The same thing applied to Olivia. She quickly regretted wishing for Violet to disappear and she almost lost her for good. The overall lesson of the story is teaching you to really think about what you wish for. It may seem fun to have wishes but you may end up regretting them like Olivia. That is why you should always be careful what you wish for.