Answer:
(Fatwa: 750/632/B=1433)
As long as your sister is alive, all her brothers shall have her wilayah. And after her death her property shall be divided among her brothers and sisters as per the rule للذكر مثل حظ الانثيين (brothers will get double of the sisters).You may know the division after her death by writing the detail of her heirs.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
