Mary Kay Letourneau and former student to discuss married life after rape scandal with Barbara Walters HEIDI GUTMAN/ABC Former Seattle teacher Mary Kay Letourneau Fualaau and husband Vili Fualaau are seen with Barbara Walters on the eve of their 10th wedding anniversary. After nearly 20 years, they're still together and say better than ever. Mary Kay Letourneau Fualaau, the former Seattle teacher who in 1997 famously became pregnant by her 13-year-old student whom she went on to marry, is celebrating her upcoming 10th wedding anniversary in a tell-all interview alongside her husband, Vili Fualaau. In a sit-down interview with Barbara Walters, scheduled to air on "20/20" Friday, the couple will discuss their scandalous relationship — which sentenced her to seven and a half years behind bars — and what keeps them together, despite their 21-year age difference, according to ABC. MARK GREENBERG/AP Mary Kay Letourneau (l.) wed Vili Fualaau (r.) shortly after her release from prison in 2005. The 52-year-old Letourneau, who today has two teenaged girls with her former sixth-grade student and four others from a prior marriage, will also discuss her plans to have her status as a registered sex offender lifted and one day teach again. That would come nearly two decades after she was arrested on child rape charges. ALAN BERNER/AP Mary Kay Letourneau, seen in court in 1998 on child rape charges, was sentenced to seven and a half years in prison. Vili Fualaau, for his part, will discuss his personal struggle with alcoholism and depression as well as his belief that the system failed him when he was a minor. Following his then-teacher's conviction he filed a lawsuit against the Des Moines Police Department and the Highline School District for failing to protect him from sexual exploitation, stemming from his relationship with Letourneau When Letourneau was released from prison in 2004, she told Walters that she planned to marry her former student. "We've always planned that and it hasn't changed," she said. Proving her vow to be more than just talk, the couple wed in 2005. Their two daughters are now older than Vili Fualaau was when he conceived them and plan to make an appearance alongside their parents Friday.