That's a good point, she could have been. But if they were worried about the seizures being part of his inattentiveness, would they still have grounded him to his room? He can't control that part of his brain. (I know you can't answer that. I'm just wondering how they think.)
He said when Kyron brought home anything but a green card she wanted Kaine to discipline him by grounding him to his room for the evening, eliminating play time or not letting him watch movies.
"There was no room for error," Kaine said.
The couple frequently argued about disciplining Kyron, he said.
http://www.oregonlive.com/portland/index.ssf/2010/08/terri_horman.html
As I said - remember that this is coming from Kaine - and if he is convinced that TH disappeared Kyron, he has every reason to paint TH in a negative light. The part about wanting a daily report could easily be verified by asking the teacher - however the question of who wanted Kyron disciplined and how is much more subjective. I would be much more comfortable accepting that it was TH if that info came from a 3rd party source.