Who didn’t think South Carolina Governor Marc Sanford was cheating on his wife when he went missing for four days and couldn’t get his story straight?

At a news conference in Columbia, S.C., Gov. Mark Sanford has now admitted that he had an extramarital affair with someone in Argentina, as he attempted to explain his mysterious disappearance from the state last week.

He said he had developed a relationship with someone in Argentina during the past year. Mr. Sanford returned from Buenos Aires this morning, after leaving the state capital last Thursday. His whereabouts had become a source of nearly national speculation, with aides first saying they didn’t know where he was, then saying he was hiking on the Appalachian Trail but unreachable.

Mr. Sanford also said he would resign from his position as head of the Republican Governors Association.

As for his wife Jenny, he said they had been working through this for the last five months. He and his wife have four boys.

“I hurt her. I hurt you all. I hurt my wife. I hurt my boys,” he said, and asked forgiveness from everyone. READ MORE…

His wife Jenny knew about her husband’s affair for five months (as most wives often do) and stayed with him. But now that their dirt is all in the streets, she refused to stand by him at today’s press conference.