It was the relationship that made headlines around the world. The U.S school teacher, Mary Kay Letourneau and her secret affair with a 12-year-old student Vili Fuala'au. Mary was jailed twice for the relationship, having two children to the under-aged Vili their first daughter while on trial, and a second while in prison. Over 20 years later and surprisingly, they are still together. We ask if its love thats kept them together or something else? And we speak to their now-adult children about their unusual family.