Assalamu Alaykum!
Thank you so much for sharing your dream with us. It is always such a comfort to connect with our loved ones who have passed on, especially in such a positive light. As we reflect on this, it's beautiful to remember the words of the Prophet Muhammad (ﷺ), who said, "A good dream of a righteous person is one of forty-six parts of prophetism" (Sahih al-Bukhari). Paying attention to these gentle signs is a wonderful spiritual practice.
Seeing your late grandfather smiling and happy is a deeply comforting sign. When the deceased appear joyful in a dream, it generally reflects their peace, comfort, and good state in the Hereafter. The fact that he was specifically very happy with your aunt suggests that her prayers (du'as), any charity given on his behalf, or her good deeds are actively reaching him and bringing him joy. It shows his contentment with her and the spiritual connection they still share.
Him giving money to both of you is another beautiful symbol. Traditionally, when a deceased person gives something valuable and beneficial to the living—like money, clean clothes, or food—it is a sign of unexpected provision (Rizq), blessings, and relief coming your way. Since you are unmarried and in your mid-twenties, this unexpected provision could point to success in your personal endeavors, a sudden blessing, or a period of ease and happiness entering your life from sources you might not anticipate.
This is a highly positive and reassuring dream. May Allah grant your grandfather the highest ranks in Jannah, and may He bless you and your aunt with all the abundant goodness this dream promises.