I have had the exact same thoughts. I have 2 young children, myself, and while my family is always telling me what a good mother I am, and what a good job I do with my children (I'm a SAHM)...I know for a fact that they have seen me discipline my children, and on rare occasions get frustrated with them and have to walk away for a minute to collect my thoughts.
I found it extremely telling, and was curious if anyone else had noticed that the only thing negative that was said about her relationship with Caylee, was by Ricardo Morales (I think) about Casey always having problems putting her to sleep. Obviously, that had to have stuck out in his mind for him to bring it up....but when you think about it...if Caylee had often been drugged, or left in the trunk, or duct taped, to be kept quiet or put to sleep, I believe I, too would put up a hell of a fight at bed time.
Anyway, every time I heard the witnesses questioned today, I kept thinking, this girl was putting on a show for everyone because NOBODY is perfect!!!