Tai tai (太太) is a Chinese colloquial term for a wealthy married woman who does not work. (Source: Wikipedia.)
I don't know if it is surprising to you but I have seen so many such cases over the years. There are childless couples who decide to stay childless because they want to concentrate on their careers and have double income. DINK. Double income no kids.
If the husband is super rich like Donald Trump, then, no problem. Some people are just so lucky.
OK, end of conversation.
It is not passive.
I hope my friend does not regret in future.
"Your choices and your relationships are key indicators whether you are going to succeed financially." Dave Ramsey.