So it happened that Professor Snape and a rogue Gryffindor apparated into the living room of the Granger residence in the middle of the night.
Snape immediately went to the master bedroom to ensure that the Grangers stayed asleep until they became the Wilkins, while Hermione went room to room to take what little tokens she needed and removing all other traces of her from various pictures around the house.
They worked quickly and methodically, but Snape waited until Hermione joined him to remove the memories. He knew she would need to be here, to say her final goodbyes to the sleeping forms of the two most important people in her life.
He watched as she place an envelope by their bedside. Probably with passports, the deed to their new house, and other things, Snape noted. Standing to the side as still as a board, he watched as Hermione leaned over the bed to brush her hands over her parents' faces.
"I love you, mom, dad," he heard her whimper. "This is for you. I will miss you, so much, but please understand that I need to do this to keep you safe. I'm not leaving you completely on your own though. I know you'll never take off your wedding rings, so I'm leaving a charm on them, for me. It'll let me know if you're in trouble and I'll be there to help you."
She sobbed once. "Even if you don't know me when I arrive."
She leaned in to hug them both before stepping back and wiping the tears away from her eyes.
"Do it, please," she murmured in whisper.
Professor Snape dove into the father's mind first, pulling out his memories of Hermione and bottling them in a vial. Taking out almost 15 years worth of memories of his daughter was painful for the father who loved his daughter, and the space it left was bigger than he'd anticipated. He worked quickly to fill it with repeating memories of his wife and the love he felt for her. He added his plan to fulfill her dream of moving to Australia, and the address and appearance of their new home. It took nearly an hour to go through both parents' memories and change them to his liking. Finally, with two bottles of silvery memory and two changed people in front of him, he withdrew, his magic exhausted from the effort.
"Do you know the transfiguration spells you need?" Professor Snape asked tiredly.
Hermione nodded. Taking out her own wand, she changed her parents so they wouldn't even look related to her. Their brown hair was now a sandy ginger on her father, and black on her mother. She changed her mother's features to a more Asian look, while her father she just changed the eyes and mouth. Finally, the people in the bed looked nothing like her parents. She waved her want and their likeness appeared on the documents in the envelope on their dresser.
"Let's go finish our business, Miss Granger," Professor Snape whispered.
Hermione looked at him with tears in her eyes, and his breath caught in pain. He couldn't handle the pain he saw there, like her whole world was over. He looked away from her as she strode back over to her parents.
"Goodbye mummy," she cried. "Goodbye daddy. I love you."