Mary Kay Letourneau and former student Vili Fualaau break up 'for good'

Mary Kay Letourneau and husband Vili Fualaau have broken up for good, after an attempt at a reconciliation failed.

The controversial couple, who met when Letourneau was a teacher and Fualaau her 12-year-old student, initially separated in 2017.

They decided to try and repair their relationship following the split, however it has reportedly failed.

PEOPLE can confirm a legal filing with the King County Superior Court hat states the couple intends to finalise the end of their relationship.

Letourneau and Fualaau's tumultuous 22-year relationship began when they were teacher and student at a school in Washington State.

Letourneau pleaded guilty to child rape following the discovery of their affair, which occurred while she was married and Fualaau was in sixth grade.

She served seven years in prison and remains a registered sex offender.

The couple have two children together. Letourneau first fell pregnant with Fualaau's child before he was 15.

After the former teacher finished her prison sentence, the couple were married in 2005 and settled down to raise their two daughters, Georgia and Audrey.

Fualaau, now 35, filed for legal separation from Letourneau, 57, in May 2017 shortly after the couple gave a series of interviews about heir relationship.

Now that the reconciliation hasn't worked, they will move ahead with the divorce.

“They really gave it the old college try,” the source told PEOPLE.

“They have a long history with two kids, but it really seems to have run its course. They worked really hard to fix things, but it still fell apart.

"The reconciliation just didn’t work.”