After Teacake And Janie Marry, Why Do You Suppose She Keep Silent About The $200 She Has Hidden In Her Clothes?

The $200 is Janie's emergency fund. It supplies her with a bit of stability, but it also denotes the fact that she isn't quite as trusting or naive as she was in her first marriages. If Teacake leaves her, the money will be there to afford her some semblance of independence.