Ref. No. 979/4-130
In the name of Allah the most Gracious the most merciful
The answer to your question is as follows:
If the dead person is not indebted and he has left behind a wife, the whole asset of him will be divided into 36 shares. 9 shares would be given to his wife and 6 shares to his mother, and each brother will get 7 shares. But if his wife passed away in his lifetime and he left only his mother and 3 brothers after him, the whole asset will be divided into 18 shares: 3 shares for mother and 5 shares to each brother.
If you are asking about giving from wife’s asset, then we cannot reply unless you mention all her heirs who remain alive after her death.
And Allah knows best
Darul Uloom Waqf Deoband