Well, we are all different in how we handle stress.
And, there are human beings who do not FEEL stress. Sad, but true. Along with the lack of being stressed, comes the lack of what could cause stress: A conscience, and the traits associated with people who are in possession of one:
Guilt, worry, remorse, compassion, EMPATHY (the ability to put oneself in another's place and actually FEEL what they are feeling), to name some of them.
She actually COULD have been nervous, in her own way, and being on the computer was a way to alleviate that nervousness, along with creating all kinds of alibis:
*email to Kyron's teacher
*emails to Kyron's mother, Desiree (Terri's changing the "flavor" of them is a huge give-away and a peek inside Terri's psyche that day, to my way of seeing).
*Posting photos from that morning's science fair. Whatever else she did on facebook and the internet, before following Kaine down to the bus to find that Kyron was not on it.
*doing what Kaine was (possibly and probably) used to seeing her doing this time of day.
I definitely believe that Terri harmed Kyron. I believe he died that morning for whatever selfish and unbalanced reason Terri had. Due to the Doctor appointment diversion/mix-up, which I believe was definitely planned by Terri, in order to have hours of time when no one was concerned about Kyron's whereabouts, this was premeditated. Asking Kaine for the truck that morning fits with her premeditation.
All the things she did, including what she has claimed to have been doing (such as driving a sick baby around aimlessly instead of taking her to the doctor or home, along with then taking same sick baby to the gym) that day point to her guilt, in my opinion. Her behavior since points to her guilt. These things, and much more, support the strong belief I have that this woman is in a small league of her own.
Note: I get what many here are saying, that if this was so well planned (premeditated), if Terri was cunning enough to do this, then why all the mistakes? All I can say to that is: No one said that this woman is intelligent. She could just be evil, or whatever word we choose to describe the indescribably horrible acts that human beings perpetrate upon one another. I think her ego and her self-interest, along with the fact that it appears she has gotten away with a deceptive lifestyle for a very long time, caused her to believe she could do this horrible thing. Not only that, it looks like she was also going to try and pin it on the school. She fails to show ANY emotion, any of what we would expect from an innocent step-parent and wife.
To answer my own question above, I have seen nothing that points to her being innocent of Kyron's "disappearance." Nada, zip, and zero.
THESE ARE MY OPINIONS.