It depends on how you characterize "went nuts."

This woman claimed to hear voices - which she never had before and never has since - and opted to "do its bidding."

The lunacy of swallowing this defense astounds me. She knew what she was doing. She sent her husband on an errand to get him out of the house. Then she did the awful deeds one by one. She'd googled in advance to see how long she'd have based on his trip time. Her defense is Postpartum Psychosis.

By that logic, every sociopath who offs people can wave the "but I'm crazy" flag as a defense. She belongs in a cage.