AVOCA, Ark. -- Authorities said a 13-year-old Arkansas boy was exposed to HIV when he was allegedly raped by a 42-year-old woman in his own home.

Deputies thought they were headed to a domestic disturbance call at the teen's home near Avoca, Ark., at about 2 a.m. Monday.

When they arrived they found two men arguing with a woman named Donna Sue Mars. However, during subsequent interviews, police said one of the men said Mars had sex with his 13-year-old son, Fort Smith, Ark., television station KHBS reported.

Officers confirmed that the boy said Mars forced him to have oral sex.

They later discovered she is infected with HIV, and it's a crime for somebody infected with the virus to expose someone else knowingly.

Mars' relationship to the boy is unknown. However, police said the age difference between her and the alleged victim is enough to charge her with rape.

"The woman was indicating that the juvenile was a consenting member, and the juvenile was indicating he was not -- that she somewhat forced herself on him," said Benton County deputy Doug Gay.

Police said the woman was charged with rape and with exposing another person to HIV, which is also a felony. If convicted, she could face a life sentence. Mars is out of jail on $25,000 bond.