Unknown Sister | Harry Potter Fan-fiction

3 years later after Hermione Granger has been sent off to Hogwarts School of Witchcraft and Wizardry and while she isn't at home her older sister Harper returned home. Harper Granger was Hermione's older sister that Hermione didn't know of. She thought she was the only child. Apparently Harper went missing when she was 4 years old and Hermione was just 3 years old. Mr and Mrs Granger didn't want to tell Hermione she had an older sister because they thought Harper died. 10 years later Hermione bumps into Harper but Hermione isn't too happy to see Harper.