What if the infamous car crash that killed them hadn't happened?
Or the chauffeur, Henri Paul, doesn't try to break his own speeding record or Diana and Dodi do what they're supposed to in a car and buckle up.
I'm embarrassed to say that one of my sisters buys into that nonsense. ...
You have my sympathies. Dealing with family that believe in conspiracy theories is hell. Because you can be as blunt with them as you would like
I had a co-worker back then who also did. And believe it or not, we had a manager's assistant named Diana, who happened to be visiting our company's headquarters in Paris during the last week of August 1997, so when I went to work on August 31st and the first thing I heard was said colleague asking me "Have you heard that Diana has died in Paris last night?" I thought she was referring to our manager's assistant. (I hadn't caught the news that morning because I just had a CD-changer radio installed in my car and preferred listening to my own music on my way to work.)
'Our' Diana was of course perfectly alright, but my co-worker kept on pestering me, there had to be something rotten about the circumstances of Lady Di's death. I was then in Paris a mere 3 weeks later myself and out of curiosity decided to follow the exact route Henri Paul had taken from the Paris Ritz Hotel to the Pont de l'Alma tunnel, at the same time as he did, a little after midnight, just to check how long it would take me, while obeying all speed limits, and it was nearly 3 times as long as the car Diana and Dodi were in. This pretty much debunked any cooked up theories about 3rd person interference for me, and when my co-worker started all over again, I told her so.