PITTSBURGH — A former state prison guard has been scheduled to plead guilty to forcing two teens into prostitution with the help of her boyfriend, who she met when he was an inmate at the western Pennsylvania prison where she worked.

Thirty-four-year-old Poshauntamarin Walker, who last lived in Coatesville, near Philadelphia, was scheduled to plead guilty Wednesday afternoon before a federal judge in Pittsburgh.

Her boyfriend, 33-year-old Rasul Abernathy, faces an agreed-upon 10-year sentence after pleading guilty last month and will be sentenced Jan. 8.

Walker is charged with forcing a 16-year-old runaway girl and a 17-year-old boy the couple met online to sell themselves for sex.

Details of the sex-trafficking charges are spelled out in an FBI search warrant unsealed in February, a few days after the couple was arrested near Philadelphia.