I really think she killed Caylee out of anger at Cindy and she had a fit of rage and jealousy. Caylee probably was crying for her grandmother when they left and all the screaming/arguing scared little Caylee.
KC was in a jealous rage and killed her. Probably hid her in the trunk, spent the night at TonE's and snuck back home early the next morning, if at all.
BTW, Cindy, how can you hear someone "breathing" through a door and was did you see KC's car when you left for work on the 16th????
Then again, I really don't think George saw KC nor Caylee on the 16th. He was too "detailed" about what they were wearing, backpack colors, etc.
I hate her too!!!! Hey KC - Get ready for some squirrel stew (always heard squirrel taste like chicken, and I know you must love chicken!!