"Mary Kay Letourneau Fualaau made national headlines in 1997 when she became pregnant with the child of her then-13-year-old student, Vili Fualaau.
After their affair was made public, Mary, a former teacher in Seattle, went to prison for nearly eight years and gave birth to two of Vili's daughters, one of which was born behind bars. Vili was just 15 years old when their second child was born.
The couple married in 2005, just 10 months after Mary was released from prison, and they will soon be celebrating their 10th wedding anniversary. Mary is 53 and Vili is 31.
They sat down for an exclusive interview with Barbara Walters, in which they talk about raising their two now-teenage daughters, and how their relationship has changed...
Watch the full story on ABC News "20/20" Friday, April 10, at 10 p.m. ET."