When she got close enough to see that the book was open to a completely blank page, she noticed a black stain on the carpet beneath the end table that hadn’t been there yesterday either. The stain was rough, but formed a vague shape that was unfamiliar to the young woman. She grasped the book and closed it, noticing that the cover had the same exact symbol that was stained into the carpet at her feet. Frowning at the strange mystery, Kathleen decided to ask Violet about it the next time she ran into her.

Her bagel popped out of the toaster, causing Kathleen to gasp and jump at the sudden noise. Scoffing at her skittishness, she dropped the book back on the table and returned to the kitchen to eat her breakfast. As she crunched on her bagel, it struck her how quiet the house was. It wasn’t the lack of input for her sense of hearing alone that struck her as being out of the ordinary, that combined with the knowledge that her parents were gone for more than a week made her off, somehow. That must be it.

Swallowing the last of her meal, Kathleen left the kitchen, taking the stairs two at a time to the second floor. Hearing the clash of swords and the grunts of men coming from her sister’s room, Kath smirked and proceeded into her bathroom to clean up. After a shower, make-up, hair maintenance, and shaving, the young woman stood out on the landing at the top of the stairs. Still hearing the sounds of battle coming from her sister’s television, Kathleen decided to make good on her suggestion yesterday to give videogames a chance. Spontaneous, yes, but after thinking about what she had said (she had been talking out her ass to cover an awkward situation), videogames seemed like the source of more stories now, more than just another way for businesses to make money.

She knocked on the door, after which the sounds of the game stopped and Violet opened the door.

“You’re lucky I’m not playing an online game. If I were, I couldn’t have paused it for you.”

Kathleen blinked. “What? Why?”

Violet rolled her eyes and strode back to her chair, picking her controller back up. “Because I would be locked into a game with other players, all of us actively playing. The game plays until the match is over.”

“Oh.” Kathleen felt a little dumb. Of course that makes sense. She took a few steps into the room and looked at the screen as her sister unpaused the game. It didn’t look too complicated, just a man in armor with a giant sword fighting skeletons in dark hallways. Violet glanced at her sister peering at the TV.

“Can I help you with something, Kath?”

Kathleen told her that she was making good on her suggestion yesterday. Violet’s brows rose in surprise.

“Really? I thought you just made that up because you wanted to change the subject.”

“Why would I want to do that?”

“Because I caught you checking me out again.”

Kathleen averted her eyes. Violet’s tone of voice was mostly neutral, but Kath still felt a little too embarrassed after that last remark, so she got up to leave.

“Wait Kath, don’t go yet.”

Kathleen pause a few steps from the door.

“I know you’re trying to be appropriate, sis. I shouldn’t have said it like that. If anything I’m flattered by the attention you’re giving me. So let’s just forget about it, okay?”

Kathleen felt a lot better now that the air was cleared. “Okay, Vi. Consider it forgotten. So what is this game?”

Violet’s face got hard. “It’s called Dark Souls. One of the most punishing videogames out there. I think my character died like fifty times when I played yesterday.”

Sitting on the bed with a quizzical expression on her face, Kathleen asked why someone would play a game that was so tough.

“Well, I suppose winning is that much more satisfying. Plus the storyline is unique and very dark. I like it, when I’m not being torn apart.”

Kathleen nodded and watched the game being played for a while. It wasn’t exactly boring, but after a while, watching her sister kill things on a television screen got a little tedious. Looking around at the posters on the wall, somehow her eyes alighted on Vi’s lovely hair. Unconsciously filling her lungs to the brim, Violet’s scent on every particle of air, Kathleen bit her lower lip and looked sideways at her sister’s pale skin. Nerds are so hot she thought to herself. The black t-shirt stuck to every indentation and corner of Violet’s body, telling her steadily more aroused sister that Vi was not wearing a bra. The white skirt she was wearing clashed with the shirt, but it wasn’t like either one of them were dressing to impress.

Then again, Violet didn’t have to dress a certain way to catch her sister’s eye. The bare feet planted in the carpet gave way to shapely white legs that were flawless in Kathleen’s unique opinion. As her line of sight stopped at the hem of the skirt that Violet was wearing, which had rode up a bit, Kathleen spotted something peeking out from beneath the skirt. Her clandestine check-out of her sister through her peripheral vision wasn’t exactly the most detailed, but Kathleen was sure something was sitting in between Violet’s legs, which were spread somewhat.

Forgetting about subtlety for a split-second, Kathleen looked almost directly at the unknown object. In the shadow of her sister’s skirt, it seemed to be a dildo! She could definitely make out the shape of the distinctive penis-shaped head of the toy. Kath’s eyes widened slightly; she had walked in on her sister masturbating! Kathleen felt like an intruder all of a sudden, feeling embarrassed that she had interrupted Violet’s pleasure session.

At that moment, a wave of enemies overwhelmed Violet’s armored character, and the words YOU DIED overlaid themselves on the screen in bold red. Violet sighed and shook her head.

“That was the longest I ever went without dying to date!”

Kathleen took this opportunity to excuse herself, saying that she wanted to get some reading in before dinner.

“Yeah, I’ve got a couple chores to do anyways.” Violet said as she got up to turn off her console. Kathleen’s eyes settled on the spot where Violet was sitting; there was nothing there but the indentation of a butt. Kath had thought that her sister was sitting on the toy to hide it from her intrusive sister, but there was nothing there. Her confusion rose steadily. She was absolutely sure that something had been in between her sister’s legs.

As Violet bent over to put her game in its spot next to her other games, her skirt lifted up, and there it was: a large flaccid cock with a pair of balls to match, both far too real-looking to be fake. Kathleen’s astonishment was so complete that the words were out of her mouth before she could stop herself.

“Oh. My. God.”

Violet froze for an instant and then quickly stood up straight, adjusting her skirt with her eyes wide in embarrassment. The sisters stared at each other for a moment, Violet rigid with uncertainty about what was going to happen next, Kathleen beginning to recover from her surprise.

Before anything else was said, Violet poured out the story of what had transpired the previous evening, her quest for something to read in their father’s library, the discovery of the old tomes, seeing the word ‘penis’ on one of the pages, the ink flowing off the pages, and then finally, Violet’s genital replacement by unknown means. By the end of it, Kath’s jaw had dropped even further.

Kathleen managed to find her motor skills again, and her voice a moment after. She took her sister by the shoulders and gently urged her to sit down.

“We’ll get to the bottom of this, Vi. Even if we have to learn whatever language was etched in those books, we will change you back to normal.”

Violet nodded, her sister’s support soothing her shot nerves. She took a deep breath and calmed herself. She wasn’t counting on anyone finding out about this, much less her own sister, but now that it happened, she was glad to have Kathleen in on the secret. Carrying a burden was always easier with two people rather than only one. Violet glanced over at her sister, who averted her eyes at the same time. Vi decided to open up to her some more.

“I tested it last night before bed. It works perfectly.”

Kathleen was surprised for a moment, but the more she thought about it, the more she believed that that is exactly what she would have done once the shock of the change had worn off. Looking at her sister, trying to make sense of the whole situation, Kathleen realized that her panties were soaked through, for some reason. She shifted on the bed, but before she could do anything, Violet spoke.

“Do you want to see it again?”

Kathleen pondered, but only for a moment. Her curiosity got the better of her, so she nodded.

Violet lifted up her skirt, revealing the long member, and grasped it with both hands. Kathleen shook her head at the size of it, having never seen anything like it in real life or on the internet.

“What does it feel like?”

Violet giggled at the question. “I can’t explain it. The head is sensitive, and the balls are really sensitive, but it feels good to play with them all.” As she spoke, she ran both her hands up and down the shaft of her cock, which was slowly growing in size. Entranced, Kathleen watched as it extended to its full length, roughly twelve inches, and began to throb the slightest bit.

“You don’t still have your pussy, do you?”

Violet shook her head, lifting up her ball sack to show nothing below but her anus. “Last night, I felt my guts moving around before this huge thing grew; my vagina must have disappeared or something.”

Kathleen’s hand went to her own crotch for a second as she tried to imagine what it must have felt like to feel internal organs changing. Violet saw the movement, and tried to gauge her sister at that point in time. As her cock was hardening, Vi’s lust was rising at an equal rate. She had never had the tools necessary to fuck a girl before, so before now she had never given the action any thought. But now, with a huge cock between her legs and her sister deep in her own imagination, the act of hetero sex seemed like a real possibility. Besides, Kathleen had been turned on by Violet for years now. Violet didn’t think that the cock was turning her sister off, the exact opposite, as a matter of fact. Before she lost her resolve, Violet spoke.