And they said it wouldn't last...

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.... “I don't think there's ever a full 10 good years of marriage,” Vili Fualaau told Walters. “You have your ups and downs in marriages. But, you know, what matters is how you pull through all the bad times.”

Barbara Walters's interview with Mr. and Mrs. Letourneau Fualaau airs tonight on 20/20. (Hey, remember when Mary Kay hosted a "Hot For Teacher" party at a club in Pioneer Square?)