Trusting your wife is the worst possible thing you can do. No one should be so stupid to do that.

I won't ever grant anyone access to my coins, not even partly. When I'm no longer part of this world, my coins will be 'burned' for ever. I don't do it because I want to gift other fellow Bitcoiners extra value now there are less coins in circulation, but it's a principle thing. I'm not being selfish. Why is it selfish to just have your coins go down with you? I'm in no way obliged to help anyone who didn't do shit to deserve even one single satoshi of mine.

Who's there to help you? Family members are mostly just as much of a snake ready to bite when you're not looking. No thanks.