John Edwards, Rielle Hunter sex tape? Edwards' former aide says he's seen it

Just when you thought the whole Edwards affair -- pregnant mistress, cancer-stricken wife, lies and more lies -- could not possibly get any sleazier.

Former democratic presidential candidate John Edwards made a sex tape with his mistress Rielle Hunter, according to Andrew Young, his ex-aide, who has written a book about the Edwards campaign and the affair.

OK, this enough to make both Elizabeth Edwards and the Dish Rag throw up.

Young claims that he found the videotape in July 2008 while going through garbage at a Raleigh, North Carolina house Rielle Hunter once lived in. "There was one tape that was marked 'special,'" Young told ABC News in a clip that will air on 20/20 Friday.

"It's a sex tape of Rielle and John Edwards made just a couple of months before the Iowa caucuses."

"It's definitely him... but you see -- you clearly see his face for a long time. And I can't speak for the other body parts, but it's definitely his face."

"It's a sex tape of Rielle and John Edwards made just a couple of months before the Iowa caucuses. It's definitely him... but you see -- you clearly see his face for a long time. And I can't speak for the other body parts, but it's definitely his face."

Oh, Lordie. And wait... why was the aide going through the trash?

Young said he can't identify Hunter by her face. But he adds that the woman in the XXX-tape was visibly pregnant, wearing a bracelet and thumb ring, all of which were often worn by Hunter.

What, no tramp stamp?