Speaking barely above a whisper, Jackson said little in court other than replying to Judge Lawrence F. Stengel's questions with "Yes, sir," or "No, sir."
Her former boyfriend, John Jackey Worman, 39, of Colwyn, has been charged in a federal indictment with more than 50 counts of producing and possessing child pornography.
Prosecutors said several of the dozen children who were molested and raped were infants, one just 3 months old. More than 1 million images were found on Worman's computer, including thousands of videos that Worman produced of himself raping children, prosecutors said.
Police said Worman had installed a video camera in Jackson's bathroom wall that allowed him, between 2003 and 2005, to videotape children as they used the toilet, undressed and showered. Jackson allowed Worman to videotape the children in exchange for rent, according to court documents.
Jackson also turned over supervision of infant girls in her care to Worman, and knew he was taking them to another room to sexually abuse them and document the abuse in photographs and videos, prosecutors said.
Dorothy Prawdzik, 43, of Drexel Hill, also has been charged in the federal indictment with helping Worman produce the child sex videos. Prawdzik, who prosecutors say was another one-time girlfriend of Worman, undressed the children and posed them in front of the cameras, authorities said.
Stengel also ordered Jackson to continue with psychological counseling, register as a sex offender and have no contact with her four children, ages 15 to 19, or any victims or witnesses in the case until after the trial of Worman and Prawdzik.
Prosecutors will seek a sentence of more than 20 years when Jackson is sentenced in December, Assistant U.S. Attorney Michelle Rotella said.
Public defender Mark Wilson said his client was also a victim of Worman, who was hired to do construction work at Jackson's home and moved in not long afterward. Wilson described Jackson as a single mother with a 10th-grade education, divorced amid physical abuse allegations and living on disability assistance after being injured at her convenience store job.
"He saw that, and he took advantage of that vulnerability," Wilson said. "She's not a predator and she's not a pedophile."
Rotella declined to comment on Wilson's characterization, citing Worman's and Prawdzik's upcoming trials, but said after the hearing that she was pleased with Jackson's guilty plea.
Jury selection for the pair is slated to begin Thursday. Worman has been in custody since February 2006 and is being held in the Delaware County jail in lieu of $4 million bail.