بسم الله الرحمن الرحيم
During lifetime, the brother himself is owner of his income. However, if he dies and does not leave behind any son or father then his sister shall also have her share in his property. For example, someone died and he only left his wife, two daughters, two sisters. Then all the property shall be divided into 48 shares, out of the total the wife shall get 6 shares, each daughter shall get 16-16 shares, while each sister shall get 5-5 shares. The detail of Shariah division is as follows:
Wife: 1x 06 = 06
Daughters: 2 x 16 = 32
Sisters: 2 x 05 = 10
Total 48 shares
Note:(a) It is just an example. What is your case write it completely then we shall write the Shariah ruling.
(b) The rules and regulations related to inheritance issue are detailed. So you must not reach to any conclusion by the above mentioned examples yourself. If needed then you should contact any Mufti.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.