What is the ruling on a wife sponsoring an orphan without her husband's knowledge, given that the money spent is from her private allowance given to her by her husband?

It is permissible for a woman to give charity from her husband's money to the poor or to sponsor an orphan if the husband explicitly permits it, or if the amount is small, which is customarily agreed upon. The permission can be explicit or understood from custom and common practice. If the woman is prohibited from giving charity, or if custom does not permit it, then it is not permissible for her to give charity without his permission. However, if she gives charity from her own private money or from what she has saved from her allowance, then she may do so even if her husband does not permit it, because the money is her exclusive property. If the sponsorship of the orphan is from her own private money or her allowance, and she is of sound mind, then it is permissible for her to do so, and it is a great good deed. However, if the money belongs to the husband, then it is not permissible for her to give charity except with his knowledge or his verbal or customary consent.