You can create a 'family' 1Password account and your wife can have access via there - that's what I do. We have certain 'shared' passwords, bank details, car/home/life insurance, all logins etc. for all of the stuff that should be shared and then our own personal vaults (my wife isn't exactly chomping at the bit to login to my Overclockers forum account) - but when you're part of the family vault you can get access to everything in another family members vault if required. 1Password currently does it via their support and has a dedicated area for it where you'd submit the necessary documents (access key, death certificate etc.).I have a 1Password account, which it would be handy to give her access to, and I could add a lot of the information in there, but short of writing down the master password for her (which has it's own security implications), I'm not sure how to do that.
Also, I know it's not the point of your post, but hopefully you're doing ok. A colleague of mine really unexpectedly passed away in November last year and it knocked the stuffing out of a lot of us. I still find myself now almost expecting him to be in certain meetings, he was just a really good guy.