Katherine Knight: An Australian woman who, in 2000, murdered, skinned, dismembered and cooked her husband, and attempted to feed him to his adult sons

https://en.wikipedia.org/wiki/Katherine_Knight

She was the first woman in Australia to be given a life sentence without any possibility of parole.

(Edited to add the link. I did add it originally, but I guess it doesn't post it if you also write in the body of the post? 🤷‍)