A.L. definitely looks like she's trying to hold Casey still, she's not holding Casey's hand, but Casey's arm closer to Casey's elbow. A.L. looks like she's listening to J.A. too though from the look on her face.
http://www.wesh.com/video/21931324/index.html
At about the 1:37 mark, after J.A. says "Could Caylee have understood what was happening to her? Did she try to resist?", that is about the time that C.A. and G.A. got up and walked out of the courtroom. You can see them leaving in the videoclip. Those words by J.A. describing how Caylee was murdered and how Caylee had duct tape put on her had to be very difficult words for C.A. and G.A. to hear.