From my heart I am sorry for your loss.First hand knowledge.
But first, my prayers for a positive outcome with your cancer.
Now, Indiana is set up that when a spouse passes, the surviving spouse gets everything, no questions asked. How do I know? A while back I lost my wife to cancer, and everything automatically passed over to me. There were no papers needed and no questions asked when it came to what we owned.
I would suggest that you give what you want to your son and your wife while you are still with them so that you can see what ever joy they get from the items, but pray that your outcome is better than my wife's.