What drove teacher Mary Kay Letourneau to begin a secret affair with her 12-year-old student? She was jailed twice and even had two children to the underage Vili - but somehow the relationship endured, and remarkably they are still together today. This week, Matt Doran sits down in an explosive interview. Plus - Denham Hitchcock comes face to face with a fearsome polar bear. That’s Sunday at 7pm on Channel 7.