The woman's three children are now with their father, Warren County Prosecutor David Fornshell said.
Investigators were working to identify anyone who may have paid for the videos or otherwise was involved, he said.
He said that while prosecutors have strong evidence in the case, it may prove to be challenging because the woman's competency to understand the proceedings and assist in her defense may be called into question.
But, he said prosecutors are confident that the woman is competent to stand trial and will aggressively pursue the case.
"It's hard for people to fathom that anyone would do this to a child," he said. "Clearly somebody engages in this kind of conduct has something wrong with them. The issue is whether she understands the difference between right and wrong, and we believe she did."
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