Why didn't Omoni want to discuss important matters with sun-Hee?

Omoni is Sun-Hee's mother in When My Name was Keoko, by Linda Sue Park.

The plot takes place during World War II, when Japan occupied Korea. Sun-Hee and her brother had to witness the oppression and forced culture changes that were happening around them.

One of these changes was learning Japanese, which Omoni didn't understand well. Therefore, she couldn't fully comprehend what was being said in the broadcasts and sometimes didn't know what was going on.

For this reason, and because it was "men's business" she would not answer most of her daughter's questions. Being the youngest and also a girl, she wasn't allowed to talk much or even listen to important matters.

Eventually, Sun-Hee learned that it was useless to ask Omoni most questions.