Is it permissible to give a female relative money from the charity (sadaqat) because her husband is unemployed and she has a child who needs surgery?

It is permissible to give to a poor patient in need of surgery, who cannot afford it, from obligatory (such as zakat) or voluntary charity, because he falls under the category of the poor and the needy. So, if the child in question and his father do not possess the cost of the surgery, it is permissible to give to him from charities, unless the charities are designated for specific individuals or descriptions that do not apply to the child.