HILLSBOROUGH, N.C.  -- A former aide to John Edwards says the two-time presidential candidate's wife has threatened to sue him for contributing to the downfall of their marriage.

Andrew Young said Wednesday that Elizabeth Edwards has threatened an "alienation of affection" lawsuit. Young said he had anticipated that the Edwards family would come after him following his book about the candidate's affair.

Young also turned over to a judge Wednesday a now infamous sex tape that purportedly shows John Edwards in a sexual encounter with mistress Rielle Hunter. He then faced tough questions from Hunter's attorneys who were frustrated with his changing story about where the tapes had been kept.

North Carolina is among about a half-dozen states that allow a person to sue a third party for contributing to the breakup of a marriage. Jilted spouses typically use the remedy to seek money from their partner's lover.

"We have some very powerful people coming after us," Young said. "Are we scared? Absolutely."

A spokeswoman and an attorney for Elizabeth Edwards declined to comment. Young said he's going to fight to prove that he and his family are not liars.

Young initially claimed to be the father of Hunter's child and helped hide her from media and Elizabeth Edwards during the 2008 White House campaign. He detailed in his book the rise and fall of his former boss and the lengths Edwards went to to hide his affair and the child he had with Hunter.

Young said he found the sex tape in a home he rented for Hunter and that he kept it to corroborate his story.