Financial infidelity refers to the act of withholding important financial information, such as debts, expenses, income, or assets, from one's partner in an attempt to deceive or control the couple's financial situation. This can include secret bank accounts, hidden investments or holdings of cryptocurrencies. This phenomenon can have serious consequences particularly during divorce.
If hidden accounts are discovered, this can, depending on the country, have various legal consequences such as a tax audit but also prosecution for fraud, etc...
https://www.cnbc.com/2023/05/20/bitcoin-in-divorce-how-spouses-hide-assets-crypto-hunters-find-them.html
How does this work in your country, and what would you do with your coins in the event of a divorce?
Honestly, if my wallets were discovered during a divorce case, I’d probably be more worried about the unpaid capital gains taxes than the asset split itself.
That could get tricky fast.
That said, I'd definitely try to argue that all the BTC were gifts — and in many jurisdictions, gifted assets aren't subject to division during divorce.