Is it permissible to give Zakat on money to divorced sisters who live in their parents' home or alone and are in debt, knowing that the questioner helps his mother with household expenses? Can these debts be paid off with Zakat money?

It is permissible to give Zakat to needy sisters, and it is considered an act of charity and maintaining kinship ties. They are allowed to use it to fulfill their permissible needs, including paying off debts. As for the mother, it is not permissible to give her from Zakat based on poverty and destitution, because her maintenance is obligatory. However, it is permissible to give her from Zakat to pay off her debt if the debt was incurred for a permissible reason.