Maybe Cindy didn't break down while talking about Caylee because she was remembering happy things. When she talked about KC, it brought out the sad feelings.........she's in jail, we don't know if she deep down believes KC harmed Caylee or not, but no matter what she believes there are now sad feelings associated with KC.
I think Cindy and George are in forgiveness mode. Maybe thats what it will take for them to live through this. Too bad they can't forgive the people that Cindy blacklisted from the service. But they are going to forgive KC for anything and everything. It may be the only way they can go on. I don't agree with it, but I can understand it.