In the Event of My Death is this Creepy or Cute?

Weird title, i know but here me out this. My wife, is basically my entire world and I am her's, we made a decision once that we didn't want kids because we where enough for eachother (\*dramatic pause for you all to vomit\*) A few months back i had a bit of a health scare, turned out to be a false alarm but it got me thinking. Statistically i will die before my wife, I know that most men in my family have an annoying tendency to die relatively young. Now i hope that she dies first, because if I go before her, i know how terrible that is going to be, saw it with my dad after my mum died just how terrible it is the be the one left behind but he had his kids, my wife does not. This got me thinking though..... What if i created a file on my PC with letters and recordings of myself to my wife. I already keep a journal and have done for years and catalogue pictures of our life together so could include that. Part of me thinks though that might actually be a fucked up thing to do. Also thought it would be quite a nice thing to have if i ever end up with dementia Just curious on everyones thoughts PS am not planning on dying for at least another 40-50 years.