A few minutes later...
As the two of them finally arrived at the blank pages, their heartbeat finally went back to normal.
"Sophia, do you think Mom really wants to do that kind of stuff with Alex?"
Mary nervously asked, as her face was still blushing red from the pictures inside the book.
"I-It's just a bunch of pictures. Mom wouldn't dare actually to do any of that stuff."
Sophia stated with a firm face, but her initial stuttering wasn't reassuring at all.
She was starting to regret reading the whole thing, as Katherine's face looked extremely satisfied in the picture.
It was starting to make her curious about what sex really felt like, but her rational mind told her it was still way too early for her.
"Are we done with the book?" Mary asked as the rest of the pages seemed to be blank.
"I guess so," Sophia murmured as she closed the book back up, feeling relieved that it was finally over.
Just as she was about to put it away, she suddenly noticed the slight color on the paper on the very last page.
Curious, she opened the book back up before opening to the last page. But within seconds, she threw the book across the room.
"Ah! What the heck was that? Why did it just change like that?"
"What's wrong? Why are you panicking so much?"
Mary asked as she walked over to the book, unable to understand what freaked Sophia out so much.
"The last page had my face on it when it just had Alex's face on it a few seconds earlier!"
"Really? I thought the rest was blank... What do you mean your face——"
As Mary picked the book up and flipped to the last page, she was surprised to see Sophia's face there as well.
More importantly, the camera-like picture changed right before her face, changing from Sophia to Mary.
"Huh... That's interesting. This book can change." Mary murmured as she walked back to the bed with it.
"H-How are you so calm?" Sophia nervously asked as she inched backward.
"I mean, it's mom's book. Why would I be surprised this book might have some magic on it?"
Sophia froze for a second before realizing that she panicked for no particular reason.
Her face started to blush in embarrassment as Mary turned out to be more calm than she was.
"I never knew my older sister could be easily scared by such a small little thing——"
"Shut up. I just got jumpscared by that picture. I would have been calm like you if I knew what was in it."
Sophia quickly grabbed the book out of Mary's hand, showing her bravery as she looked back to the last page herself.
To her surprise, the picture went from Mary to being back to her face again.
It was almost as if whoever looked at the last page had their face captured into the book.
"Wait, Mary. Look at the book with me."
As Sophia put the book flat onto the bed, they both looked at the last page at the same time.
To their surprise, both of them appeared at the same time, with the same posture and everything.
"Wait, this is just like a mirror." Mary pointed out.
"Yeah... A mirror that can capture an image until it's opened again."
As Sophia closed the book back up, they both noticed the side of the book had ink on what used to be blank pages.
The two of them looked at each other for a second before Mary nodded to Sophia.
Even though it was mostly the same as Katherine's, the location was much more exciting.
Some of the background was literally in the school classroom, with some even in the school restroom.
After flipping past several more pages, Mary froze for a second as she couldn't believe what was in the book.
A woman who looked just like herself was having sex with Alex, just like Katherine and Sophia in the book.
However, she was the only short one in the book, despite her face indicating that she had grown older, just like Sophia.
"Fuck fuck fuck!"
Mary immediately closed the book, feeling the same embarrassment that Sophia had experienced.
It was all fun and games when she wasn't in the book. But now that she had learned she was inside it, her mind was filled with destroying it.
However, remembering all the attempts that Sophia had made earlier, she quickly dismissed them as she opened the book back up.
Just like Sophia, she could see herself going through a lot of pain as Alex put his thingy inside her.
Her face slowly changed into pleasure as the picture portrayed the next scene.
After reading the entire thing in just a few minutes, Mary's face was blushing red.
Unlike the other two, she was the most willing to try different things that were clearly unconventional.
"Why am I so lewd in the book——"
"Mary! Open the door!"
Sophia's voice interrupted Mary's train of thought as she quickly tried to find a place to hide the book.
After putting it underneath the bed, she slowly headed over to the door before opening it.
"What's wrong, Sophia?" Mary asked as she pretended to be extremely sleepy.
"Hand the book back. I know you took it away from the desk." Sophia stated as she barged straight into Mary's bedroom.
"Book? I thought you had it on your desk."
"Don't play stupid with me. I know you took it... I'll find it myself if you don't want to hand it over."
As Sophia began searching the room, Mary's heart started to beat faster and faster.
Especially as she walked over to the bed, flipped over the blanket, and checked behind the pillow.
But after searching almost every possible place she could think of, Sophia still couldn't find the book.
"Mary, just hand the book over. You shouldn't be reading his kind of book. I know you hid it somewhere."
Sophia demanded, getting a little impatient as she finished checking the bathroom.
"I don't know what you're talking about... Maybe the book has some sort of magic and went back to Mom's backpack."
"You really don't want to say it?"
As Sophia walked closer and closer, Mary took a few steps back until she accidentally fell onto the bed.
"I don't know what you are on about——Hahaha, let me go! I really don't know where the book went."
Mary burst into laughter as Sophia kept tickling her sides, refusing to stop despite her repeated plead.
"Fine. You make me do this."
Just as Mary felt relieved that Sophia had finally stopped, she suddenly grabbed onto her feet before tickling it.
"Stop it——Hahaha——Let me go——Fine, I hide it under the bed."
Sophia finally let Mary go as she peeked under the book and immediately found it hanging underneath the bed frame.
"I knew you had it. You really tried to fool me? I'm your older sister for a reason."
"Hmph!"