mary kay letourneau and her husband vili fualaau , 31 , will talk about her rape trial and their married life in an interview with barbara walters on ' , which will air on friday .
the former seattle teacher shot to infamy after starting a relationship with fualaau when he was a 12-year-old sixth-grade student and falling pregnant with his child when he was just 13 .
after his teacher was convicted , his family filed a lawsuit against the police department and the school district for failing to protect him from sexual exploitation .