Harry stared at the woman.
"W-who are you?" he stuttered.
"You don't know?" she asked. "Let me give you a hint. The last time I saw you, you were three years old."
Harry blinked and looked away. He had no idea who this woman was, but she seemed to know him. And that disturbed him.
"What are you doing here?" Harry asked, directing his attention to Quirrell.
"But you already know that, don't you, Harry?" Quirrell said. "You did all the research. I'm surprised you didn't tell your friends. But, that does make it easier for us, doesn't it?" he addressed the woman.
"Indeed it does, Quirinus." she said, giving a wry smile. "I did not think he would tell his friends. I was indeed extremely surprised that he did not tell Mr. Snape."
Harry stood, staring, at the woman, seemingly frozen in fear.
"Now now, Harry, what's wrong?" she asked with mock concern. "You look a little frightened."
Harry blinked. "Oh, um, nothing."
A voice came from behind, the source out of view.
"Harry?"
Severus was calling his name, looking for him.
"Oh, good, we've got company!" the woman said, looking pleased. "Maybe he can figure out this mirror."
Only then did Harry notice the large mirror that the woman was standing in front of.
Severus entered the chamber, and froze.
"What are you doing here?" he spat at the woman. "How did you get in here?"
"I just walked in." the woman said innocently. "Why would that be unusual?"
"You know why, Petunia!" Severus exclaimed, drawing his wand, but the woman called Petunia was too fast for him.
"Expelliarmus!" she shouted. Severus's wand flew out of his hand. He stared.
"How did you do that?" he asked.
"How would you have done it?" Petunia asked. "Magic."
"Well, that is how I would have done it." Severus agreed. "But there's one problem with you being able to do it."
"And what would that be?" Petunia asked.
"You're a Muggle."
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