No one could say that Lily was not true to her word.
It had not sat well with her, the exchange at Borgin and Burkes. She vaguely wondered if things would have turned out better had she not been fresh out of a row with Casey, or if she had not been so defensive considering how close they were to discussing her need for Wolfsbane ingredients. Whatever the reasons for her attitude, they had not been the sales clerk's fault. Certainly, he damned himself further by being high at the time, but she knew she would not have cared had it been any other day.
So here she was, approaching the very shop in question, exact change in her hand to make up for the difference between what she had already paid and the cost of the Ptolemy that she had left the store with. It was not a Hogsmeade weekend, but Lily had never been one to honor the rules for the sake of being a good pupil. She had to sneak away from Casey's watchful eye, as there would be much to much to explain otherwise.
She wasn't sure he would be there, as it was the time of day when shifts changed and people took their breaks, but that would be even better. She could leave the money in an envelope and not have to face the man - Lily was brave, sure, but she also did not seek confrontation if she could help it. She walked the streets of Knockturn, her hand clenched around her wand, her eyes lifted so she could see anyone around her.
The door was open. She slipped inside the shop and immediately felt like something was out of place. No one was manning the store, and she could hear muffled voices from above. Lily knew the clever thing would be to turn around and walk out. It made more sense. But Lily had been becoming a different person as time wore on, and she was getting so bored with everything life was dealing her. There was no spark, no thrill. And here was a mystery, straight out of a novel - would she really turn around?
She crept through the silent store and went through the staff room, wand now held before her, every step a reminder that this was not right and therefore potentially dangerous - and it was this thought that kept her feet moving. There was a set of stairs and she climbed these, before finding the door to what she suspected to be the attic. Voices behind the door both beckoned and warned her, telling her she was so close to discovery. Still - there was surely nothing good waiting for her. She could turn around right now and be no worse off.
So this was why the Sorting Hat had chosen Gryffindor over Ravenclaw.
She opened the door and the scene before her hit harshly. There was Henry, and there was... her Headmaster? She did not know much of the man, having only just returned to Hogwarts, but she knew enough that this was indeed him. Her wand had fallen on him by chance but she now held it there, as he seemed to be more in the position to cause harm. Her other hand went up to her wand and she held it trained on him, her legs tense. She would not claim to be the best dueller she knew, but she knew she was the quickest.
"Back away," she said, attempting to sort out this situation.