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CHARLOTTE -- The investigation continues into the affair that led to the resignation of CIA Director David Petraeus. On Friday, Petraeus admitted to having the affair with his biographer, Paula Broadwell, a Charlotte resident.

So far, there's been no sign of Broadwell or her family returning to their Dilworth home over the weekend. Sunday, a neighbor told News 14 Carolina that she's been emailing back and forth with Broadwell and says she and her family are away at an unknown location.

All weekend, local and national media have been in the neighborhood on standby for her return. She has yet to release any statements regarding the situation and calls to her agent have not been returned.

The affair was uncovered when the FBI was investigating several harrassing emails Broadwell sent to 37-year-old Jill Kelley. Kelley is an unpaid social liaison at Macdill Air Force Base in Tampa. In a statement, she said she's been friends with Petraeus for more than five years.

Lawmakers say they want answers: when was this uncovered, why they weren't notified sooner and was national security compromised?

On Thursday, Gen. Petraeus was scheduled to testify before a congressional intelligence committee on the deadly attack on the U.S. consulate in Benghazi in which four Americans were killed. According to the Washington Post, the agency's interim director, Michael Morell, will speak in his place.

However, South Carolina Sen. Lindsey Graham says Petraeus may need to testify.

"I hate what happened to Gen. Petraeus for his family and the families for those involved. But, we have four dead Americans in Benghazi," said Graham. "We have a national security failure long in the making. I don't see how in the world you can find out what happened in Benghazi before, during and after the attack if Gen. Petraeus doesn't testify."

A meeting is scheduled for Wednesday between intelligence committee leaders, the CIA acting director and the FBI deputy director to discuss the details of Petraeus's affair.