https://amp.9news.com.au/article/daf2e7b1-a001-4def-98af-fb7da20f17f0

A Florida mother has been sentenced to 21 life terms in prison plus 800 years after being convicted of "evil and horrific" sex crimes against her children.

In 2022, Assistant State Attorney Katy Reid said then-26-year-old Natalie Wagner recorded videos of herself committing sex acts with her children, aged one and three.

Reid said she would sell the videos for up to $US50 ($75) on the social media app Snapchat to users, making specific requests about what they wanted to see.

"She was their mother. I mean, she was the one person who should have made sure this never happened to them," Reid said.