Here is a little teaser for you from chapter one...

Hermione rang the bell. Muffled voices and footsteps could be heard on the other side of the door. The door opened just enough for the slim figure of her mother fill the space between door and frame.

Hermione froze. She had been ready to offer a polite greeting, but when she saw her mother standing there in her favorite jeans and cozy cardigan, her bushy hair pulled back in its usual neat bun, she could not speak. Harry coughed, and nudged Hermione with his elbow.

"May I help you?" her mother said. Her sharp eyes had caught Harry's not-so-subtle encouragement, and she looked warily at Hermione, waiting for her to explain their presence on her doorstep.