Casey was a child constantly criticized by her mother. She 'learned' to lie to avoid being punished. Sometimes it worked, sometimes it didn't. It was a crap shoot, but lying was an 'art' that she honed to perfection. She had a great teacher, because... Mother, wanting to 'prove' her success by putting forth the perfect child, covered up Casey's mistakes by lying in turn, oftentimes to her father (GA). My money is on the fact that Casey screwed up often, Mother knew, Casey saw Mother lie on her behalf, and then took the punishment from Mother behind closed doors all the while learning that manipulation is not only acceptable, but a necessary survival skill. This carries on into adulthood. Casey screws up, Mother lets loose with verbal 'punishment' behind closed doors, then covers Casey's a*s so no one will know what Casey has done or what a screw-up job Mother has done with this child. Casey has a child. Finally, she has leverage with her Mother. She thinks. Nope. Doesn't work. Mother know best, and constantly criticizes Casey's mothering skills. Casey can't win. Here is where it gets interesting. Casey wasn't born a sociopath. She was made. She sprung from a little girl who cried herself to sleep at night because she was a 'dummy'. A 'bad' child. An imperfect 'idiot' who could 'Never-Do-Anything-Right'. Casey tried to love her daughter. In a way, she did, but AHEAD of that was her need to prove to her Mother that she was better than the fu*k-up her Mother perceived her to be. In Casey's mind, this simply meant out-maneuvering and playing head games to conceal the 'bad things' she was doing. Just like when she was a child. She never meant to kill Caylee. The chloroform? Well, in all the movies she's seen, it's how you put someone to sleep. They don't die. They sleep and then wake up wondering what happened...in the movies...but something went horribly wrong, and JUST LIKE IN THE PAST, Mother gets mad, lashes out, then covers up the 'bad thing'... JUST-LIKE-ALWAYS.