Here's Chapter 57, of my story Weirdness at Waverly Academy. Today, Nancy talks with the Hubbard twins.
Caught red-handed, the Hubbard twins tried their best to explain everything to Nancy.
"Our mother is dead, and our father is absolutely useless when it comes to raising two girls," one Rachel said. "We thought if we didn't get accepted into a boarding school, we'd end up in foster homes."
"We applied everywhere, and Waverly agreed to give one of us a scholarship," the other Rachel said. "So...we decided to share it."
"The two of you have been here for four years, pretending to be the same person," Nancy summarized.
"Besides for taking a few leftovers"—one of the Rachels gestured towards the plate of food on the desk—"we haven't done anything wrong. You have to believe us. If we were doing something wrong, we would have been found out by now."
Nancy thought about it, as she considered her previous interactions with Rachel. "The two of you must switch places every now and then," she concluded.
"Exactly," one Rachel said.
"That's why the second time I went to your room, you didn't recognize me," Nancy said. "And that's also why you said you didn't like Mel, but then later you said you liked her. Those were two different Rachels!"
"Technically, only I'm Rachel," the Rachel on the left said.
"I'm Kim," the Rachel on the right said.
Nancy looked back and forth between Rachel and Kim. The two were identical twins, so there was no way to tell them apart. The only difference Nancy could see was that Kim had tucked her hair behind her ear.
"Nice to meet you," Nancy said. "Have you two really been doing this for four years?"
"Yes," Rachel said. "And we've only got one more semester to go! We're so close! You can't tell anyone, Becca!"
"Please!" Kim begged. "If you tell, we'll get kicked out of school! That's why the Black Cat—"
"Kim!" Rachel said.
"Oops," Kim said.
"Woah, what?" Nancy asked. "What's this about the Black Cat?"
"Well...you know how I told you I haven't gotten any Black Cat notes?" Kim said. "That's because she knows about us."
"Huh?" Nancy asked. Now she was completely confused.
"The Black Cat somehow found out that there's two of us," Rachel explained. "She's been blackmailing us ever since, forcing us to do her dirty work."
"So you locked Danielle in the closet!" Nancy accused.
"No!" Rachel said. "All we've done is make the Black Cat notes and deliver them, I swear!"
"Whoever the Black Cat is, she's obviously setting us up to take the fall," Kim said. "If she gets caught, she'll frame us for everything while she goes scot free! You've got to do something!"
"Why me?" Nancy asked.
"Yeah," Rachel said. "Why are you telling her all of this?"
"If she tells, we'll be kicked out anyway!" Kim said. "But Becca can help us! She can figure out who the Black Cat is—and then we can blackmail the blackmailer!"
"A stalemate! Yes!" Rachel said. She high-fived Kim.
"Heh heh," Nancy said. This was an interesting situation. "Well, I could play detective and try to figure out what's going on. I've always wanted to try my hand at detective work."