Ever since the tragic day Michael died, Marie says she has tried not to think about the "what ifs." What if she had picked up the phone when he called? What if she had put her son on a plane instead of promising to visit on Monday?
"There's always 'what ifs,'" Marie says. "I think if you live in 'what ifs,' you stop living."
Instead, Marie finds strength in her faith and her children, with whom she has always been close. She also believes that her close relationship with Michael and the fact that he saw her struggle as a single mother may have been part of the reason he didn't tell her what he was struggling with himself.
"I think he didn't want to burden me with one more thing," Marie says to Oprah before turning to the audience. "Tell your children it's never a burden."