Lissette Gabbard from Marshfield is charged with child endangerment.
The incidents happened in June of last year. Gabbard pleaded guilty June 5.
The man facing charges is Nathan Marty Ryan.
Prosecutors say Ryan tried to get the 9-year old girld and 5-year old boy to have sex with each other and exposed them to pornography. He is charged with sodomy and using a child in a sexual performance.
Ryan is due back in court July 17.