I'm not going to 'save' my husband from poisonous mushrooms
Why would you not save your husband?
I have better things to do with my or anyone's life, he's essentially dead already if he was so stupid to eat poisonous mushrooms.
I really think you should reconsider. Your husband's in a dangerous situation and really needs your help right now. You don't want to do something you'll regret.
It's called a cold wife out there and I don't want to be like that. If I were him, I'd rather die.
Entering a marriage union means being there for one another during the difficult times. At minimum you're expected to try and find him some help. Are you truly not going to care if he dies?