IT is believed that you are all covered by Hindu laws in your matrimonial and estate/property matters..
Either spouse has NO forced share in estate/property of other spouse in her/his life time..
Thus wife has NO forced share in self earned/acquired estate/property of husband.
Wife is not a co-parcener in ancestral property of husband.
Wife can appraise the court about estate/property of husband to decide the matters of maintenance and alimony for self, children…
You are counting income, and you may count your liabilities also and keep irrefutable written record..
If your mother decides to sell off her self earned/acquired/absolute estate in her life time she can do so and even give cash to anyone..