I agree with you. She waited for an opportunity. What she did was evil.
Animosity towards one's child is a projection of animosity towards the other parent. She hated her husband, so she killed his children. When men do this, they often kill themselves too, or are killed by the police.
Some people do not wish to believe that such evil exists, so they attribute evil acts to mental illness, and feel that every murderer should continue to live. Evil people rely on such morally confused people to go to bat for them.
Agreed.
The only reason she wanted to wait until she was alone was so that she could ensure that she could kill all of them. If another adult was present she could only kill one or two of the kids. She started from youngest to oldest also for that reason.
I remember reading an article about this a few years ago. When Rusty arrived home, an EMS worker insisted on giving Rusty some water...Rusty's comment: "Good luck finding a clean glass." What an odd comment from a man who just found out his wife killed his 5 kids. These words have always haunted me for some reason.