Bussiness problems

I am 40 years, my second brother is 38 years, my 3rd brother 35 years, my father 65 Years old. Our father is the owner of the business but my mother is still controlling the shop. She sits on the cashier and controlling the business. Our father has to ask her for money and she always questions about what my father is going to do with the money. Sometimes she refused to give money if she comes to knows that our father is spending on us. The business is very big but we are still struggling for money etc. In other words we cannot see barkat in that family business. The company has two trucks and one car. But my brothers and I have no car. We have only motobike due to short wages. What shall we advise our father?