Two decades after they were embroiled in a rape scandal that shocked the world a former teacher and her then student reveal the secrets of their enduring marriage.

TWO decades after they were embroiled in a rape scandal that shocked the world a former teacher and her then student reveal the secrets of their enduring marriage.

In 1997 Mary Kay Letourneau was sent to prison for seven and a half years in Seattle after it emerged she was pregnant by her then 13-year-old student Vili Fualaau.

After her conviction Fualaau stuck by her and following her release from prison the pair married in 2005.

The couple, who have two children together, will be interviewed by US media veteran Barbara Walters to coincide with their tenth wedding anniversary.

On US ABC’s 20/20 show the couple will discuss their scandalous relationship and what keeps them together despite their 21-year age difference, reports New York Daily News.

Vili Fualaau reportedly will discuss his struggles with alcoholism and depression and his belief that the system failed him when he was a minor.

The couple will be joined for the interview by their daughters, Audrey and Georgia, who are now both teenagers.

The couple first met when Fualaau was in the second grade. Their relationship became sexual when he was 12 and she was a 34-year-old married mother of four.

It was a friend of her husband who told police about the relationship. Letourneau was arrested and gave birth to the couple’s first child, Audrey, while she was on bail in 1997.

She was sentenced to six months in county jail but after her release she resumed the relationship and was rearrested after she was caught having sex with him in her car. The couple’s second child was born while Letourneau was behind bars serving seven and a half years for rape.

In the aftermath of Letourneau’s trial Fualaau’s family filed a lawsuit against the police for failing to protect him from sexual exploitation.

The couple were married in 2005 after Fualaau asked a court to have a no-contact order overturned. They have been together ever since.