Wow - some interesting questions. What is CA afraid of? IMO that ICA will be found not guilty and she will be coming home.
Why doesn't ICA tell CA the gory details? She's not smart but she's wily - any chance it could fall into evidence or have her mother waving it around isn't something she'd be willing to risk.
Because she knows as soon as she does tht, KC will cut her off. She has also been told (pretty sure it was Lee) that the best way is to not be threatening - he talks about this in his deposition with Morgan.
But if you read Cindy's earlier letters, she most definitely puts the guilts on KC and talks about Caylee and how much Caylee LOVED her mother, etc., etc. and how she is in heaven, etc.
If I can see this is trying to get KC to open up, I know that KC saw it. It was blatently obvious that it was what Cindy was doing.