Let me see if I have this straight:
Mom found her two year old dead in the swimming pool, pulled her out, kept her body in the trunk until the car smelled, took the body and buried it in a field. Meanwhile, she partied hearty, and didn't say anything to anyone about her daughter's death. When she could no longer cover up the death, she made up a story about a non existent nanny who had taken the little girl.
And, she didn't kill her daughter and try to cover it up?
Doesn't that stretch credibility just a bit?