You said it was a few months back so life has gone on. You don't know the level of closeness between the child and her grandmother and aunt since they did live in the same town..and you don't know if the grandmother did say to get the child something.

Unless you know what you want to accomplish by saying something...let it go because I don't see what good can come out of it

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Nobody can make you feel inferior without your consent.

E. Roosevelt