I could see KC lining up to implicate GA (and maybe even LA) for having been in some way responsible for "how and why she was capable of killing Caylee.
On the other hand, I think since the discovery of Caylee's tiny remains stunned them all, the A's simply can't face KC directly because without shallow talks of how to find Caylee and what's on the jailhouse menu, they have nothing else to talk about but the TRUTH.
If they avoid facing the perp, they can all continue the denial until enough time has elapsed that they can convince themselves even the public considers Caylee old news, then they can reunite to "turn over a new leaf" as a family "united" without ever once speaking the truth of little Caylee's brief life ever again. They will remember her only the way they choose to: free of any culpability whatsoever on their behalf.