Page "Freaky Friday" Paragraph 4

In the climax and dénouement, Annabelle becomes overwhelmed by the difficulties of her situation, apparent disappearance of her mother, loss of the children, and the question of how her odd situation came about and when / whether it will be resolved.

Finally, it is revealed that Annabelle's mother herself caused them to switch bodies through some unspecified means, and the mysterious girl who took Ben was Mrs. Andrews in Annabelle's body ( to which she is restored ) made much more attractive by a makeover Mrs. Andrews gave the body while using it, including the removal of Annabelle's braces, an appointment Annabelle had forgotten about ( and would have missed, had she been the one in her body that day ).