I myself I don't find anything wrong with your Bitcoin password, seed phrase, or private key with anyone, including your partner. Because you don't know what might happen in the future, you never can tell if you might fall ill or something more severe than that so I strongly advise that you at least share it with a trusted person like your spouse your mum, dad or a brother also a sister. Although when it come to spouse that's better for me I don't know about your own opinions in the forum.
Whether Bitcoin or other investments you have to make sure they are secured for you and also your loved ones, i mean i believe one of the reasons we do search for wealth is so both we and our loved ones can enjoy with us and in even in the event of unforseen circumstances, your love ones can still enjoy the merits of your hard work.
Even if you dont want to communicate it immediately and very directly to them you can at least put in the places that in the event of anything they can easily access it, especailly if it is a situation that needs money to help you out or pay bills.
