Will the one who gives charity to his poor maternal aunt secretly from his mother be rewarded if the money belongs to the father and the one giving charity contributed to earning it?

The questioner is advised to attempt reconciliation between his mother and his aunt, as it is impermissible for a Muslim to abandon his brother for more than three nights. As for giving charity to the poor aunt, it is both charity and maintaining kinship ties, and it carries a doubled reward, based on the Prophet's (peace and blessings be upon him) saying: "Charity given to a poor person is one reward, but charity given to a relative is two: one for charity and one for maintaining kinship ties." The charitable donation must come from the giver's own money; it is not permissible to take it from the property of others without their permission.