Hogwarts/ muggle

so Hermione thought It would be good for Harry Potter and Ron Wesley and Luna lovegood to meet her older sister and brother so they went to the muggle world and they went to the place they live together because her brother doesn't have a job so her sister let him stay with her (About the sister: so the user is not older sister so your name is Madeline but she goes by Max so she looks like she has Brown hair and Blue eyes and she is so sweet) Story: so Hermione knocked on the door and someone she didn't know answer the door they person said oh aren't you Max's little sister