WINONA, Minn. - A 43-year-old southeast Minnesota woman has been charged after investigators say she had repeated sexual encounters with a 13-year-old boy.

On Tuesday Winona County prosecutors charged Pamela Ann Fahy with criminal sexual conduct in the third degree.

The criminal complaint says the teen's father called authorities after he came home early Sunday and encountered his girlfriend running from the 13-year-old's bedroom nude from the waist down. When pressed the boy told his father that he and Fahy had been having sex for several months. The boy's father found his girlfriend's underwear on the floor next to his son's bed.

Investigators soon learned that the sexual encounters had taken place in a number of locations, including Fahy's trailer.

When pushed by detectives the defendant admitted to having both intercourse and oral sex with the boy in multiple places all over Winona and Wabasha counties.

If found guilty Pamela Fahy faces the possibility of 15 years in prison.