A:
If your wife spends her whole salary and saves nothing within a Hawl (one lunar year calculated from the time a property reaches the minimum amount upon which Zakah is due), there is no Zakah due on her. On the other hand, if she has saved dirhams out of her salary or any other resource, on which a Hawl has passed, Zakah becomes due from her for this money. It is not permissible for her to spend Zakah on her children,
since the Zakah due from a parent is not permitted to be spent on his child and vice versa. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.