Dear Reb Eliezer,
That is not the question here at all. The OP’s statement implies that if the husband gets financial help, the wife cannot use any of that money. By extension, if he gets a mortgage for their house from the bank she would not add able to live there. Perhaps if he wins the lottery, he cannot spend it on her. Because if their parents support him, then he will not be fulfilling providing for his wife. So obviously, parental support is only intended for the husband. And the wife is not allowed any benefit from it.