It’s not really a difficult question. The bottom line here is all about trust which you clearly do not have for your spouse. I think trust is very essential before going into a marriage agreement with your spouse. How could you live with someone presumably for the rest of your mortal life without having trust in the person? That’s crazy.
I think having a spouse that you could trust enough to share your seed phrase is important and no big deal. It all depends on the trust levels in the relationship.
Don’t assume that cause the person is a female, she won’t be knowledgeable about bitcoin. I’ve met a lot of crypto enthusiasts who are females.

I get your point, if you provide all your wife needs after your marriage then rest assure that he will not look at it as a property that you need to share but she will allow you to continue your investment, it depends from how you explain and how your wife see the good impact of your investment with your financial side.

Though, I can't vouch that every wife has that same sentiment. We also need to consider other personalities and other treatment when it came about the money.

There are always differences. Even you already married with the girl, it will be on your assessment and decision whether to share it or not.

Important things must be prepared. My wife has always been the support behind me. She is the closest person to me besides my parents. I trust her and I have not hidden from her financially.

I think that after getting married, the two of them are the most capable partners for both parties. I don’t mind letting my husband know my mnemonic at all. Even if I hand over my wealth to my wife, I am willing to give her a sense of security. This is what I should do.

Well I think it's all depends on how much you share with your spouse and how far you have come together, because some marriages happen without knowing the other person genuinely which compromises the trust aspect of the marriage but some happen after knowing the other person for several years and that connection is real and not fake and in this case sharing stuff wouldn't be a problem.

But rule 101,if someone is always spending money without that edge to save then don't share information of seed phrases and other bank accounts you hold because they will spend it all... though if this came to light trust between the two of you will be shaken.

At least the wife should know where the seed phrase is located, if there is no trust in the person, then this marriage is doomed. Anything can happen in life, and if it happens that you start to doubt, you can always hide the seed phrase. I'm kidding. )) I believe that marriage can be strong if you have common dreams and a common budget, otherwise everyone will move through life separately and in the end it can move very far from each other...

The question is not rightly if it is right for your husband or your wife to know your seed phrase.
The right question should rather be if it is nice for your trusted person or your next of kin who could also be your hubby or wife.
If that is the case, it is important that atleast one trusted person know the way about of your seed phrase.
It may not be your wife or husband whom you are in a contract marriage with.

I want to add to my previous writing because of course even though there has to be trust but that doesn't mean there is no privacy in a relationship and I think there has to be separation in this case even if we do trust our partners.
I personally have never kept secrets about financial conditions or anything related to money to my partner but on the other hand there are times when we have to provide several other conditions where this money can be used or not, I said from the start even though this is jointly owned money but this investment for the long term so I feel he only needs to know without having to know more by giving access (Just telling where the seed is stored) but that doesn't mean I don't believe it because we just need to be a little more careful.

They should be able to make decisions about their own assets. Sharing a seed phrase is a serious matter and should be treated with caution. It is important for each individual to carefully consider whether they want to share this information with their partner, and to communicate openly about their decision.
If a husband refuses to share his seed phrase with his wife, it may be a cause for concern, and it may be helpful for the couple to discuss the reasons behind this refusal and to find a solution that works for both parties. It is important for both partners in a relationship to be honest and transparent with each other and to work together to find solutions that are fair and beneficial for them.

Instead of giving her complete control over your assets, why not make a separate account where you can save both. Caution nowadays is that he or she might not be together for all time. Look at Bill Gates. Now you tell me.
Logical thing is to have another account.