Sorry, you have presumed wrong. Even Cindy thought the babysitter was a real person as Casey had been telling her that for 2 years.
Cindy even believed that Casey was out of town with Caylee when, in fact, they had never left town.
the only one that knew all the truth was Casey and she was just playing everyone else.
Did you ever see the movie, “The Good Son”?
I do not know what happened in that house.