Some of these political wives were bitterly criticized for subjecting themselves to such humiliation, as was Hillary Clinton, who stood by her husband—figuratively, if not literally—during some of the most fraught moments of the Monica Lewinsky scandal.

Kendra Stewart, a political science professor at the College of Charleston, said Jenny Sanford was wise not to appear at her husband’s side.

“The women receive a lot of criticism and even mocking on `Saturday Night Live’ skits, criticism from woman’s groups and other folks,” she said. “People doing a lot of speculation about their expressions, what they were thinking. And by not being present, she removes all of that speculation.”

As for whether Jenny Sanford’s absence hurt her husband, Stewart said: “I’m not really sure any more damage could be done.” In fact, the political scientist suggested that the 49-year-old governor might have helped himself somewhat by taking his lumps by himself, and not making his wife stand there the way other politicians in peril have done.

“In a way, I think the husbands took even more flak for their actions,” Stewart said, “because everyone had to watch their wives humiliated while they apologized.”

The governor’s spokesman, Joel Sawyer, said he did not know if Sanford asked his wife to be at his side.

During the painfully frank news conference, the governor said the first lady had known about the affair for five months. In her own statement, Jenny Sanford said: “We reached a point where I felt it was important to look my sons in the eyes and maintain my dignity, self-respect, and my basic sense of right and wrong. This trial separation was agreed to with the goal of ultimately strengthening our marriage.”

Unlike other political wives, “she is laying down conditions at the outset and being very specific and emphatic that he’s got to toe the line,” Aiesi said. “The other wives sort of stood there like submissive somehow. She didn’t take that approach. She said, `I love him. I want him back. But it depends on him.’ She’s holding the cards.”

On Thursday, Jenny Sanford spent part of the day with her husband at their coastal home. Later, she left with some children in her car for what she said was dinner and a boat ride. Asked if she would be staying with her husband, she said: “It’s a goal.”