I took a sum of money from my co-wife without her knowledge, and after her death I returned it to her son. Did I do the right thing?

Question:
May Allah reward you with good. She says: I found a sum of four hundred riyals in my co-wife’s bag when she asked for it for clothes, so I took the money and spent it. After her death, I gave the money to her son because he was in need. Have I fulfilled what was in my trust?

Answer:
You made a mistake in this action, which was taking this money. It was obligatory for you to return it to its owner. But since you have taken it, you must repent and seek forgiveness, and you must return this amount to the heirs of its owner after her death. If she has heirs, then you return it to the heirs, and you do not return it to only some of them. Unless he is an agent, if he is an agent for the heirs, there is no harm in handing it over to him. But if he is not an agent, then you give him his right only, and you give every person who has a right his share of this money. Unless this son is the sole heir to his mother, in which case there is no harm in giving it all to him. Yes.