Transcript for 'The Last 100 Days of Diana' and her secret love life

??? It's been nearly 20 years since the death of princess Diana and the ABC news special the last 100 days of Diana now retracing that last night in Paris. Along with rare video of her time with her boys. Here's David Wright. Reporter: Nearly 20 years after her fairy tale abruptly ended, this new ABC news special offers new details about her final days. Including that trip to Paris with boyfriend dodi Al fayed. A last-minute addition to her vacation. Diana's butler now says she told him she didn't really want to go. That's my only lift home so I have to go to Paris. I have no choice. Reporter: Burrell says she told him she couldn't wait to get back to her boys. Would you tell William and Harry at balmoral that I'll be back the day after. Reporter: Of course, she never made it. Her love for those boys was never in doubt. The impact of her death on them something they only recently opened up about. It was only right to share my experiences and to help -- to hope and encourage others -- Reporter: The ABC special shares moments rarely seen. William is a typical 3-year-old. He's not at all shy and very polite extraordinarily enough. Whereas perhaps Harry, he's a different character altogether. Reporter: A mother's insight and love. Her legacy to them. David Wright, ABC news. This Sunday at 9:00 eastern right here O ABC. We'll see you tomorrow. Good night. WCVB at 7:00.

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