Is it permissible to change the intention of donating a large sum of money as charity to help a relative to the intention of zakat, with the approach of the due date for zakat, and is it permissible to deduct this amount from the zakat on wealth?

The questioner will be rewarded twice for her charity: the reward for charity and the reward for upholding kinship ties. However, this charity is not considered part of Zakat because it was not given with the intention of Zakat. She must therefore pay Zakat, as the Prophet, peace and blessings be upon him, said: "Actions are but by intentions, and every man shall have but what he intended."