Favor Hamilton, 44, said her husband knew about her secret life as a call girl with an escort service, the report said.
"I take full responsibility for my mistakes. I'm not the victim and I'm not going that route. I'm owning up to what I did. I would not blame anybody except myself," she said. "Everybody in this world makes mistakes. I made a huge mistake. Huge."
The website published the story Thursday.
The New York Times reported Favor Hamilton was getting paid up to $600 an hour.
The Times said she worked under a fake name, Kelly Lundy, but she said she also revealed her true identity to some clients.
Favor Hamilton competed in the Olympics as a distance runner in 1992, 1996 and 2000.
Favor Hamilton had reportedly been in contact with clients to let them know she was leaving the escort business.
The Times said Favor Hamilton also runs a real estate brokerage firm in Wisconsin with her husband and has a 7-year-old old daughter.