Since it is Waajib to respond to Salaams, is it necessary for a woman to convey another woman's salaam to her husband if the other woman is older than

Answer

It is not permissible for a wife nor for anyone else to convey the salaams of a woman to a ghair mahram man. Therefore, the wife should not convey the other woman's salaam to her husband even if the other woman is older than her husband. It is improper and shameless for a woman to tell another woman to convey salaams to her husband.

It is not Waajib for anyone to convey the Salaams of a person to another person. It is only Waajib for a man to respond to the Salaam of another man or a mahram female. Similarly it is Waajib for a woman to respond to the salaam of another woman or a mahram male.