A South Texas woman has been sentenced to 30 years in prison for a baby sitting scam in which she recorded her boyfriend — a registered sex offender — molesting a toddler.

Rosa Linda Ganceres

Rosa Linda Ganceres, 54, of Mathis pleaded guilty in June to one count of sexual exploitation of a child. She was sentenced Monday to the maximum prison term by U.S. District Judge Nelva Gonzales Ramos.

Authorities say Ganceras and her boyfriend, 43-year-old Daniel Benson Billman, made a post on Craigslist advertising baby sitting services.

The mother of a 2-year-old girl answered the ad. But instead of baby sitting the toddler, Ganceres filmed as Billman sexually assaulted her.

Authorities who searched Billman's home found video of the assault among more than 1,000 images of child pornography, the U.S. Attorney's Office for the Southern District of Texas said.

Billman, who also pleaded guilty, was sentenced in March to 50 years in prison.