"Nonsense! Our Liuliu is married now. How could she not change? Have you not noticed? Our Liuliu has always been playful and has a lot of exposure to the world. She can do so many unusual things. She will learn even more in the future! The daughter I raised can't possibly be inadequate, can she?"
Liuliu's mother said this on purpose. Worried that Liuliu's father might notice that their daughter isn't the same person anymore. Afraid that he wouldn't be able to handle the truth. She figured it'd be best if only she knew the truth, that no one else would ever find out. She would take her secret to the grave. She could accept her current daughter's spirit residing in her original daughter's body, but she couldn't allow anyone else to know it for fear it might bring harm to Liuliu. No one could ever harm her daughter, not on her watch. After all, this child is as good as her own flesh and blood because she raised her.