ORLANDO, Fla. -- There is more information being learned about the backgrounds of the two sisters who have spoken to the tabloid media to claim one had an affair with George Anthony, the father of Casey Anthony, who is charged in the killing of her daughter Caylee.

The two have been using the names River and Skye, and they have talked to the likes of the National Enquirer. They are twins who also have been arrested a number of times.

Cecelia Holloway is also known by another name to publicize her sister's supposed affair with George Anthony: Skye Benhaida. She claims to be the sister of River Cruz, who is also known as Cecelia's 38-year-old twin sister Krystal Holloway.

Cecelia Holloway went on national television on the "Nancy Grace" program to support her sister's story, detailed in the Enquirer on Wednesday, of an affair that the two are claiming Krystal had with George Anthony while his grand-daughter Caylee Anthony was missing. The girl was later found dead.

George Anthony denies an affair, his attorney Brad Conway said.

Cecelia hasn't always been so supportive of Krystal's stories. In a June 2009 letter to a judge handling a domestic battery case against her husband, Cecelia wrote that Krystal lied to police about the incident.

"My sister…(Krystal) … called the police and told them he beat me up," Cecelia wrote. But Cecelia went on to argue that was a lie.

"My sister does not like my husband, there for (sic) I believe is why she had him arrested," Cecelia wrote.

Local 6 also found that Cecelia was in jail from August 2008 to January 2009, the time the two sisters claim the affair was supposedly blossoming.

Local 6 shared that finding on Wednesday with George Anthony's attorney, who had done some investigating of his own.

"It says they are questionable people," Brad Conway said.

The two women also made a joint appearance in another crime report in February 2008 after more than $1,000 in jewelry was stolen from an apartment neighbor of the twins.

The thief who brought jewelry to a pawn shop presented a driver's license with Krystal Holloway's picture on it, but left behind a thumb print on the pawn slip that belonged to Cecelia Holloway, so she's the one who got five months in jail.

In fact, on the day Casey Anthony was being escorted out of jail on Aug. 21, 2008, Cecelia Holloway was being booked there for violating probation on another conviction in Seminole County for dealing in stolen jewelry.

Court records state that both sisters have prior arrest records for attempted burglary of a structure and thefts.

George Anthony is expected to be in court Thursday for a crucial hearing in the case against his daughter Casey.

On Thursday, Casey Anthony is scheduled to be in the courtroom, as well. Judge Stan Strickland could decide whether taxpayers should help cover the cost of her defense.

The hearing is scheduled to start at 11 a.m. Viewers can watch it live on ClickOrlando.com.