I believe that KC, in a fit of rage at CA, killed Caylee on the night of the 15th. CA had her hands around KC's neck, but she didn't squeeze long enough. KC may have done the same to Caylee, with her hands around Caylee's tiny neck. Maybe she applied the duct tape while Caylee was unconscious. I don't think KC would have had any concern about saving Caylee any final moments of horror. The heart sticker might have added that little extra "personal touch". Perhaps she put Caylee's body in her playhouse for a bit, while she searched for items needed for the "disposal". I think that KC may have often wished that CA was dead, but she decided that this would be even worse for CA, to live without Caylee, to know it was her punishment. KC then had CA lying and trying to hide the truth about how Caylee died. CA was certainly in "denial", but it was not that she didn't believe KC killed Caylee. CA was in "denial" against anyone who suspected KC, and she promoted the "live" story to protect KC. When KC disappeared with Caylee after that big fight, CA was worried. KC had probably threatened more than once to leave with Caylee, who became a pawn between these two angry females. CA had more to lose, feels so guilty over Caylee's death, and will continue with her angry denials. On the other hand, KC does not mourn Caylee, she is proud, smug and loving all the attention she missed while Caylee was alive.
GA and CA went from grief-stricken to angry grandparents, then on to "fund raising" scam-parents.
IMO