Madoff Family Member Breaks Silence on ABC's 20/20, 10/21

For the first time since Bernie Madoff was arrested almost three years ago for orchestrating the biggest ponzi scheme in American history, bilking investors of billions of dollars, a Madoff family member breaks her silence and reveals never-before-heard family secrets.

In an exclusive television interview, Stephanie Madoff Mack, widow of Bernie's son, Mark Madoff, who took his own life two years to the day after his father's arrest, speaks candidly and emotionally to ABC News Anchor Chris Cuomo about marrying into one of New York's most powerful families, living through the public humiliation of Bernie Madoff's financial crimes and coping with her husband's suicide. She also reveals for the first time a letter Bernie Madoff sent to her from prison after her husband's suicide. If she saw her father-in-law today, she tells Cuomo: "... that I hold him fully responsible for killing my husband, and I'd spit in his face." Mark Madoff and his brother, Andrew, were the ones who turned in their once highly respected father.

Chris Cuomo's exclusive interview airs on the season premiere of "20/20" on FRIDAY, OCTOBER 21 (10:00-11:00 p.m., ET) on the ABC Television Network. The report also includes exclusive home videos and personal photos.

Stephanie Madoff Mack will also appear live on "Good Morning America" on Monday, October 24, 7:00-9:00 a.m., ET on ABC. Her highly-anticipated autobiography, The End of Normal: A Wife's Anguish, A Widow's New Life, will be published by Blue Rider Press on October 20.

An advance sneak peek of the interview will be available Thursday on ABCNews.com and Yahoo!

"20/20" is anchored by Elizabeth Vargas and Chris Cuomo. David Sloan is executive producer.

To view a clip from the upcoming show, click here