Taking money from the father's aunt without her knowledge before her death

Q: When I was around sixteen years old, I took a sum of money from my father's aunt without her knowledge. It was a long time before I came to realize that I had behaved unlawfully. When I decided to return the money to her and ask her to forgive me, I found that she had already died. As I feel bewildered, I am asking your opinion regarding what to do with this money. Do (Part No. 16; Page No. 449) I have to donate it on her behalf to a charity organization or just spend it on charitable ways of disposition? I want to absolve myself of the sin of theft. Do I have to make Kaffarah (expiation)? I feel deep regret after having realized the unlawfulness of this act. Would you kindly give me your reply.

A: You have to pay the money to the inheritors of your father's aunt. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.