Is it permissible, in Sharia, for a mother to donate all her money to her son who takes care of her, and if not permissible, how should the inheritance be distributed with the presence of two sisters and the children of a deceased brother, and does her half-sister from her father's side have a right to the inheritance?

For a gift to be valid, it must be proven by evidence, and the testimony of a father is not accepted therein, as he is accused of testifying on behalf of his son. It is also a condition that the gift was taken possession of before the mother's death; otherwise, it becomes void. If these conditions are met, then the gift is valid and the money belongs to the son. Otherwise, it is an inheritance to be divided among the questioner and his two sisters, with the male receiving the share of two females, and nothing for his deceased brother's children or the sister from the father's side. It is advisable to refer inheritance cases to Sharia courts due to potential complexities such as the existence of other heirs, bequests, or debts.