South Carolina Governor Mark Sanford returned to work Friday as his lieutenant governor is urging him not to resign after the controversy over his affair with a woman in Argentina. 

Lieutenant Governor Andre Bauer would take over as governor if Sanford stepped down.
    
But Bauer said he will help the governor through his remaining year and half in office.
    
Meanwhile, Sanford's wife is speaking out for the first time about her husband's affair.
    
Jenny Sanford said she found a letter from the governor's mistress in January and told him to end the affair.

She said she was shocked to learn this week that the he went to Argentina to see his mistress.
    
The first lady said she thought her husband was getting out of town to work on a book.