A St. Louis County woman pleaded guilty to a federal prostitution-related charge Wednesday and admitted convincing a 13-year-old runaway to go into the prostitution business.

Latasha Jewell McFarland, 27, told the girl last summer that she could earn $100 for each sex act that she engaged in, Assistant U.S. Attorney Noelle Collins said in court. McFarland posted pictures of the teen online, bought condoms, arranged the meetings and drove the teen to hotels along Interstate 270, Collins said, taking half of the girl's money for her trouble.

McFarland also encourage the girl to participate in swingers' parties, where men would pay an entrance fee to have sex with multiple women, Collins said.

McFarland, who broke down in tears during and after the brief court hearing, pleaded guilty to a charge of use of interstate commerce to promote prostitution and faces roughly five years in federal prison when sentenced Dec. 1.

Asked after the hearing whether the teen's customers could face charges, Collins said that in general, the FBI tries to identify and pursue customers who had sex with minors.