Maria Belen Chapur admitted to having a relationship with South Carolina Governor Mark Sanford on Sunday, saying that widely published e-mails between the two were obtained without permission.
The 41-year-old Argentine sent a brief statement to news network C5N of Buenos Aires, stating she would not talk about her private life.
"I have decided to send this statement to clear up certain incorrect things that are being reported and put an end to a matter that, as you imagine, is very painful to me, my two children, my entire family and close friends."
Chapur claims someone accessed her Hotmail account without permission late last year and leaked e-mail correspondence that described her relationship with Sanford to the South Carolina newspaper The State.
The governor admitted last week to a yearlong affair with Chapur.