ok, let's play what if!

What if the handsome and charming Prince William got engaged to a lovely, wealthy Arab lady?   How long do you think it would take before some godawful tragedy whisked them both away forever - say, a ski lift collapsing, or a housefire, or a plane crash, or a hit and run .... or maybe even just an unfortunate slip in the royal bathtub, causing them to simultaneously hit their poor little heads?

I'd give the hypothetical couple about a year. At the max.