executing her simply will solve making sure she is not longer on this plannet to burden our resources, and risk possibly causing harm to anyone else.
insane or not, something of this porportion deserves death, it doesn't have to be torture, though I would say it's ok, but I do not feel she deserves to live.
My reasons for thinking as such, If she was on medication for mental problems, thats fine, it happens to nice people, but was she on her medication when this happened? 2nd if she was having issues and her medication seemed ineffective why wasn't she receiving more help. In some ways I can also see to pointing blame on the husband for not taking every precaution to make sure she was a fit mother. 3 where was her Dr. during this time. I have a hard time believing something like this couldn't have been spotted even if just a possiblity.... Even if she just didn't take her medication for 1 day surely signs of instability were there.
this is a lose-lose situation. Even if she does live I give her 5 years max before she kills herself. She will never be able to live knowing what she did.