The starting point is the date of death of your aunt who died three months ago. The residue of her estate passes to her sister, the second aunt, because that sister was alive at that time. Now that that sister has died, her estate includes the residue due to her from the first aunt's estate.What happens to it , and the rest of your second aunt's property which that second aunt has not given as gifts ( the residue of your second aunt's estate), depends on the terms of your second aunt's will.