Is it permissible for a woman whose husband has passed away to take money from her father if her father’s money is from usurious gains, in order to meet her needs which the government’s allowance does not cover?

If a woman's sustenance from the state is sufficient for her necessities, then it is not permissible for her to take money from her father if it is highly probable that it originates from usurious gains.

However, if her sustenance from the state is not sufficient to cover her necessities, then it is permissible for her to take from her father's money only what is needed to fulfill her essential needs, and she is not allowed to take more than that.

If her refusal to take illicit money leads to a severance of ties with her father, then this holds no value; because it is ill-gotten wealth, and there is no obedience to a creature in disobedience to the Creator.