Do A Little Shake

"Goodbye, Shining!" Cadance said before grabbing his tie, pulling the surprised teen closer to give him a peck on the lips.

His eyes went wide, and a red blush immediately filled his cheeks. Twilight gagged in the doorway, but both of his parents chuckled in the background as they loaded up a small cart. There was enough packed for them to be gone for a few days.

"Awww, my little colt's all grown up!" his mother said with a proud smirk once Cadance had pulled away.

His whole head turned red as a tomato as soon as she said that. "Mooom!" Shining Armor groaned as he went to get strapped in to pull the cart.

"But we do have to go. Don't want to miss the train to Manehatten for the big flugelhorn recital!" his mother said as they started to head off down the street. Twilight and Cadance waved them off, but eventually retreated back inside.

"Bleh!" Twilight gagged once more now that Cadance had stepped through the door.

"Oh, it was just a little kiss, Twi," Cadance teased as she headed down to the kitchen to see what was there. She had to get the foalsitter things out of the way first; making sure there was enough food and activities to keep them both fed and entertained.

"Yea! But he's my brother!" she said as she trotted along. "I didn't know that you kissing my brother in front of me would be part of the deal when we planned to make him your very special somepony!"

"And I'm glad you helped. Now I can kiss him all I want!" Cadance stuck out her tongue, and Twilight rolled her eyes in a huff. Cadance opened up the fridge with a wing. It would be more than enough to keep them both fed over for the weekend, and much longer if her parents ran super late on getting back. "Carrots?"

Twilight nodded happily, jumping up on a chair as Cadance floated some over on a plate for both of them to nibble on.

"So, I know the next few days are looking real nice outside. They said they weren't planning on having a cloud in the sky."

Twilight looked like she had seen a ghost. "And... we're going to stay perfectly inside reading? Instead of getting dragged outside or something like that? You... you wouldn't do that to me, right, Cadance?"

"Hehe, maybe not this weekend," Cadance said with a small giggle. "I actually have some studying to do too, so I'm right there with you on that."

"Oh, what were you studying?"

"Let's see." Cadance floated books out from her bag, reading the titles of them one by one. "Math... homework. Language studies... there's a test on Tuesday. Umm... some other stuff..." Cadance said as she skipped the red book in the middle and looked at the last one. "Oh, and history."

"Some other stuff?" Twilight asked suspiciously.

"Yes, this red one's just another class I'm needing to study." The books started to slowly float back as Cadance opened her bookbag again.

"Wait! Is that for your super secret class that both of you are taking? And no pony's telling me about?"

The other three books slid into the bag, but kept the red one in the air. "It might be. But it’s still a subject that's forbidden for foals to learn." Twilight's eyes twitched a little as soon as she heard the word forbidden. "You'll learn everything that's in this red book when you're older," she continued and slowly twirled the book around for Twilight to get a good long look at it. "You just need to wait."

"It can't be that forbidden if my brother is learning the same things as you!" Twilight huffed as the book slid in with the rest and the bookbag closed. Grabbing another carrot, she crunched down on it, failing to hide her indignance.

"But..." Cadance started with a cheerful smile. "What have you been working on since our last time together? Any new research?"

"Yes!" Twilight suddenly sprang from her chair. "Actually, I've been working on a little something!" Her sour expression was gone completely as she raced to her room and yelled from the other end of the house. "I've been so excited to show you!" The sounds of paper and tools smacking everything in their path could be heard until she came bursting into the living room and immediately got to work.

Posters were set up quickly onto their easels with practiced efficiency. Cadance sat down to just watch the filly, especially when she needed to reach up really high, or bend down low to pick up something from the ground. However, the graphs, charts, and other visual aids did warrant a quick peek at too.

Standing proud, Twilight motioned at the finished display of research that was far above her early grade school peers. "Tadaaa! I took your suggestion last time you came over to study. The long-haired ludere apes. I was able to find quite a few things interesting about them! They are actually quite similar to the koalas, except for their obvious long hair and prominent colours around their... lower regions," she said with a hesitant smile as she pointed at the vivid mosaic of blues, greens, and reds between the apes' legs.

"Wow, that's a lot different from ponies!" Cadance said with a small clap of her hooves. "The colours are spread out all over our fur and tails!"

"Precisely! And a lot of the research in the library actually pointed to some of those specific differences from ponies too, like how they have non-monogamous pairings. So, instead of just a mother and father, the entire group, or multiple groups, are just like one big family! They are even known to engage in same-sex pairings too, well... mostly the females, which make those pairings classified as either bisexual, or lesbian in some cases."

Cadance tilted her head at the last part, almost looking a little surprised. "Oh... where'd you learn about those two words?"

"You can look at the reference section on the back, or umm..." Twilight paused, a sheepish smile growing on her face. "Or I could tell you that it was from a pamphlet... you accidentally left behind... when you were over last."

"Oh, right!" Cadance said with a chuckle. "I was doing a school project on that. I was wondering where it went!"

"You're not mad or anything?"

"No, Twilight! I couldn't be mad at you for just reading through something. Really, it was my fault for leaving it around like that! But maybe let's not tell anyone what you found."

Twilight gasped suddenly. "Y-you mean... is this part of your super secret forbidden class?" Cadance nodded firmly, and Twilight gulped. "Oh... I understand. I won't tell anypony!"

Candance stood up and looked at her seriously.

"Ok! I swear it! I even take the foal school playground oath on it!" Twilight said, standing up for the pledge. "Sunshine, sunshine. Ladybugs awake. Clap your hooves and bake a cake. If I do lie and spill the beans, you can make me eat sardines!"

Cadance cheered, and Twilight quickly joined in, rumps bumping together in excitement, before giving each other a long hug. "Good. Now, what else did you find in your research? I'm sure you want to continue."

"Yes! We haven't even gotten to the pie charts yet!"

After a few more hours of comprehensive presentation, and some breaks to eat a mix of cookies, ice-cream, and a little salad, which was later dubbed dinsert, they ended up relaxing in the living room. Twilight was lying on the floor next to the slowly dying fireplace. She was reading through a stack of books that had been switching from the unread stack to the read stack with a steady pace.

Cadance, however, was finishing up some of the math homework with paper, a quill, and a trusty abacus in her magical grasp. Although she could have been finished a while ago, she took her time answering each problem. Being leaned up against the couch, and at a very specific angle behind Twilight, it was just enough to see some suggestive shadows under the filly's tail. The flickering candlelights still hid many of the more detailed features, but it was enough to catch the darkened purple of her fur there.

As much as she drug it out, the homework problems were completed, doubled, and even triple checked. With the evening getting later, it was about time to start heading to bed. Cadance gave a small yawn and a stretch as she stood. "Alright, Twilight. I'm heading off to bed now."

Twilight didn't respond or even move in the slightest. Her eyes were still darting across the pages in front of her.

Cadance smiled and started to pack up her bag, taking all but the red book. That one remained on the end table. A simple mistake that any sleepy pony could make. "Goodnight, Twilight," she said as she left the room.

A small smirk crept up on her face as she walked down the hallway and made her way to Shining's room. Cadance rolled her hips a little, feeling the growing frustrations from watching filly butt for a few hours. While she did have permission to sleep in their parent's room, it wasn't beside Twilight's like Shining's was. Plus, it was kind of funny knowing that hoofing it in his bed would get him all riled up when he got back.

Closing the door and landing in his bed was enough to just want to fall asleep right away, but there was more that needed to be done. Her ears were on full alert for any noise, but a hoof slowly slid down as the seconds passed. Gentle circles. It was enough to need to breathe deeper, but like many nights of babysitting before, she remained nearly silent.

Her hoof was damp, and steady ministrations were slowly starting to build towards a stealthy finish. However, a small creak from down the hallway put everything to a halt. Tiny hooves on the floor. Not the kind of a filly just going to bed, but one who was trying to sneak into their room without anyone hearing. But those floorboards were never merciful enough for that.

As soon as the door closed, Cadance checked the time on the abnormally large clock. Her hoof started moving again as numbers started to swirl in her head. With an approximate length of 72,000 words in that book, and Twilight's average reading speed of 875 words per minute, plus about a 10% bonus factor for focusing on a forbidden book. It would take her...

Cadance shivered and breathed a little harder than expected, with a sudden rise of tension in her loins. Her hoof dug in harder as she dove into some long division. It'd take about an hour and a quarter to finish the whole thing.

Out of the 14, chapter 5 was focusing heavily on the female anatomy... that wonderful female anatomy and those delicious flanks, and those. Cadance shook her head, needing to focus. It would take Twilight approximately...

She bit her lip as she continued, those equations having a hard time staying in her mind when purple cutiemarkless flanks kept springing up just as she was getting close to the answer. The jumbo-sized clock was ticking by, and precision was key, else the last pages Twilight would read would be more focused on the stallion anatomy of the next chapters. The fewer questions on that, the better.

With one last push, it was so close, yet still so far away. Masturbation and math were always a tricky balance, but sometimes a girl just needed the right tool to finish the job. She pulled out her abacus.

It was already well lubricated from earlier in the night, and flicking those beads into just the right spot was easy enough with her practiced hooves. She smirked as she started everything all over again and quickly realized how close she had previously been without any help.

Her hooves moved fast, until everything just came together in all the right ways. "26 minutes, 43 seconds," she whispered under her breath before biting her lips and pressing in hard between her legs. She clenched as a rewarding wave rushed through her, dampening her hoof enough until it started to soak into her tail and the sheets below.

Glancing over at Shining's big clock, she calculated exactly when Twilight closed the door and just how long it would take her to reach the end of chapter 5 after that. There were still several minutes left, and she was more than content laying there in her blissful afterglow, watching as the time ticked by.

Even though things were a bit too sensitive right now to push for more after that mathurbation session, her hoof still moved around in idle circles. It was enough to keep her awake until the countdown ended. She slowly slid out of bed in the last minute and got ready by the door. With fifteen seconds left, she took fifteen steps down the hallway and opened Twilight's door right on time.

At least, it was close to being on time.

Twilight was heavily focused on reading through the red book, flipping through the remaining pages of chapter 5.

A few seconds too early.

Cadance couldn't help but take another look at her favourite filly laying on the floor like that. Even though the room was dimly lit, she could catch a little sheen in the candlelight. Not much, but enough that you could see if you were really looking. Fortunately, she was.

Whether or not Twilight was aware of the dampness, Cadance couldn't really tell. Twilight really did get engrossed enough that she might not have even noticed anything yet. With a smirk, she stealthily stepped closer, her tail swishing slowly behind her, helping waft her needy scent all around the room. After a few seconds more, the page flipped again, right onto chapter 6.

Cadance’s horn lit up, and she slid the candle ever so slightly.

"Ahh!" Twilight shouted and slammed the book shut.

"Hey, Twilight," Cadance said with a sweetness to it. "Have you seen one of my textbooks? I might have left one lying around, and I can't seem to find it."

"Oh, hey! You know," Twilight said, looking at the borrowed goods in her hooves. "Funny story! That book that you said I couldn't read is here!" She stood up and nervously giggle-snorted. "Good thing that I found it for you!" She quickly passed it over like it was a hot potato. Her smile was shaky, like she was desperately trying to stay calm but was just on the edge of crying.

"Wonderful! I'm glad you found it!" Cadance said, floating it away; Twilight's sad eyes followed. "Don't stay up all night reading. You'll have all day tomorrow to do it," she finished as she blew the candle out.