WORLDWIDE ENQUIRER EXCLUSIVE: John Edwards' mistress Rielle Hunter has agreed to sit down for a bombshell interview with ABC News Barbara Walters, the ENQUIRER has learned exclusively.

"Rielle will break her silence for the first time with Barbara Walters. The interview will air on ABC in June," a source told The ENQUIRER.

"Rielle is so angry with Elizabeth Edwards for trashing her repeatedly while promoting her book that she's decided to break from John. She's going to defend herself and tell her side of the story!"

The ENQUIRER previously reported Rielle was considering going public, narrowing her choice of interviewer to Walters or fellow TV journo Diane Sawyer.

"Rielle thinks Barbara will relate to her better because she admitted to a long-ago extramarital affair in her memoirs," the source revealed.

AND after a DNA test proves once and for all that Rielle's daughter, 1-year-old Frances Quinn, is John Edwards' love child, the little girl stands to get a whopping $10 million of his fortune!

Sources told The ENQUIRER that Rielle is demanding her baby get a quarter of the disgraced former presidential candidate's estate, which is worth an estimated $40 million.

As The ENQUIRER recently reported, Rielle is demanding that Edwards submit to a DNA test to prove he fathered her daughter, and she's working with a lawyer to take legal action, sources say.

The 45-year-old blonde divorcee decided to push for the DNA test after Elizabeth Edwards slammed her in her book, and called her "pathetic."

"Rielle is going to work with an attorney to make sure her baby is entitled to a share of the Edwards' family wealth." the source divulged.

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