If your son was a super wealthy multi-millionaire and lived in LA or New York, but he wasn’t famous and wasn’t close to your family members (brothers, nephews, nieces, etc.), would you tell them your son is rich?
Me personally, a lie by omission is still a lie, and hiding and keeping secrets from your family is wrong. I get that the son in this scenario could keep his wealth private from his extended family members if their situation is like mine—I only see my family, like my uncle and cousins, once a year, and that’s it, and we barely talk on the phone or social media. I don’t even follow them. But if my son got wealthy somehow, it would be morally wrong not to tell them.
I see no moral imperative to tell people about others financial status unless not knowing would directly harm them, like if they were about to lend money to someone known to not repay their debts.
People don’t have a right to know everything about everyone.
In this scenario my sons wealth would not negatively impact those relatives so I have no moral obligation to tell them. In fact, telling them even risk harming my sons relationships and physical and emotinal and social wellbeing, so it’s more immoral to tell my relatives about this.