Is it sufficient for a thief to be absolved by her father, from whom she stole money, for him to forgive her without knowing about the theft, or must she inform him of her deed in order to clear her conscience?

Theft is a grave sin, and a son stealing from his father's money combines theft with disobedience to parents. Sincere repentance is obligatory, and the stolen money must be returned to the father. The described method of seeking absolution is not sufficient; rather, the father must be informed that he has a right over you, and then his absolution becomes valid thereafter.