That said you also need to think about something easier to understand, because it would be a shame if, after you're gone, your wife didn't know how to access Bitcoin to sell it. I once said to a trusted friend, "When I'm gone, help my wife sell all my Bitcoin assets. I've written down everything I need to access those assets somewhere." I don't know if this is a good decision, but at least it gives her an alternative after I'm gone. Death is unpredictable, and we must be prepared to ensure our assets don't die with us. While most people might not trust their wives or friends, I find this preferable to losing assets due to my wife's inability to access my wallet.
I think that in this case you must trust your friend very much, because when it comes to money, the most unexpected surprises are possible even from the most reliable people. If you trust your friend to help your wife sell bitcoin and only your wife knows where you keep the seed phrase, then I fully assume that after you are gone and your wife gives the seed phrase to your friend, he will be able to do anything he wants with your bitcoin, and your wife will not be able to stop it. If you want to leave everything to your wife, then just teach her how to handle bitcoin properly.