I don't think it was fake, I believe she was angry and disgusted. She was being confronted with her lies "at the end of the hall".
"Is it wrong of me though to not really want to know the truth? I'm honestly scared for the numerous possibilities. She's safe, she's in God's loving arms; in a lot of ways, I'm content by the fact that she will never have to have her heart broken or see the constant negativity that our society breeds, nor will she ever be abused or taken advantage of."
"I look at my pictures of Caylee so many times throughout the day and I can't help but smile at my little rock star."
People like Casey are sensitive to other people's body language and emotions. She could sense the wrong kind of attention was coming down on her. She was trying be the grieving mommy and everyone was picking on her, looking at what Caylee and her mother had become. With these photos, her defense is just not making sense. She was most likely angry at the pictures of what she's done that everyone in that room was examining and then having to listen in detail what they were looking at. Angry at Caylee and Cindy and whomever else she could think to blame for them "making" her kill Caylee and for all that damning evidence Caylee held on to. Disgusted when they were talking about leg bones and skulls with hair mats because we all know how superficial Casey is and a dirty skull just ain't cute. Disgusted remembering the color leave Caylee's delicate skin and then the decomposition and hauling. This was her first kill (that we know of) she will improve...
The looks and actions of her attorney's this afternoon told me not that they were sympathetic of her but for the first time, I think they realized collectively how scary this chick is and they don't have any control over her.
"They just want Caylee back, that's all they're worried about right now, is getting Caylee back..."
And who was everyone making a big fuss about at the end of the day?
So to answer the question, yes. I think she was in panic mode especially listening to the photo evidence, but panicking for a different reason you or I would. Getting her way calmed her right down.