Praise be to Allaah.
Firstly:
Islam has made it obligatory upon the husband to spend on his
wife on a reasonable basis, according to what he can afford. And it does not
oblige the wife to spend on herself even if she is rich, except with her
willing consent, and that is by way of kindness and helping her husband.
Among the things that the Prophet (blessings and peace of
Allah be upon him) said in his sermon during the Farewell Pilgrimage is the
following: “Fear Allaah with regard to women … Their rights over you are
that you should provide for them and clothe them in a reasonable manner.”
Narrated by Muslim, 1218.
An-Nawawi said in Sharh Muslim, 8/184: This indicates
that it is obligatory to spend on the wife’s maintenance and clothing. This
is established by scholarly consensus. End quote.
For more details please see the answer to question no.
3054
Secondly:
It is not permissible for the husband to take anything from
his wife’s salary except what she gives willingly. Anything he takes apart
from that is haraam. See the answer to question no.
112032
For information on advice to both spouses concerning such
matters, please see the answer to question no.
126316
Thirdly:
If the husband spends on his wife from his own wealth on a
reasonable basis, then it is not within her rights that he should tell her
how much he has and how much his savingsare, or how he plans his finances
and so on.
Fourthly:
If the wife contributes her salary to the family expenses,
then it is her right to know where and how her money was spent, and how much
of the monthly household budget she is supporting and so on, and this
becomes more important if she asks for that. Otherwise it is within her
rights to withhold her contribution altogether.
And Allah knows best.