Daddy, what's sex?

"Ma...gic...al...cer...e...mo...ny..." Flurry spelled out, reading through her picture book. "Ca...nter...lot..."

"Very good Flurry." Cadance smiled as her daughter looked to her with joy. "When I was your age, I never could say so many syllables."

"Well maybe she gets it from me." Shining Armor said, walking in the room; a book filled cart following behind him. "Or maybe Twilight rubbed off on her."

"I think I did see her reading Flurry the Ponyford Dictionary to her last time she foalsat." Cadance responded, thinking back. "What do you have their Armor?"

"Oh, well when I told Twiley that Flurry was getting ready for primary school." Armor explained, floating a few school textbooks. "She wanted me to give her her old textbooks when she was in school."

"I'm pretty sure those are a tad dated." Cadance stated, looking over the well preserved books. "She always did take care of these though."

"Is it any more dated than what the Crystal Library has?" Armor laughed a bit, causing Cadance to laugh a little in agreement. "Though I think some of these are also some of her notebooks. This should make it a little easier for Flurry." Levitating the books over, Armor neatly stacked them. "Look at that Flurry, your Auntie Twiley gave you some books for school."

"Yay! Auntie Twiley!" Flurry cheered, hugging her dad. "Love you daddy." Turn towards the pile of books, Flurry's horn ignited, grabbing at a couple of the books and displaying them in front of her. "Many words!"

"Yes, it might be a lot, but just take it a step at a time." Armor said, reassuring Flurry to go at her own pace.

"Okay, Daddy!" Flurry replied, looking through the books. Flurry was so focused, that she didn't notice her parents leaving the room.

Later that day, Armor noticed Flurry hadn't come down for her before dinner snack. Thinking she was still studying, Armor decided to bring her snack to her. But as Armor approached the door, he could hear a faint noise coming from the room. Curious, Armor placed his ear against the door, listening to what he could assume to be faint moaning. Worried about his daughter, Armor ignited his horn, casting a small see through spell. With this magically enhanced sight, Armor looked through the door and found Flurry masturbating.

"T-this is what I do?" Flurry asked herself. Her body was arched downwards, her face pressed on the floor, and one of her hooves rubbing at her tiny pink pussy.

Armor was shocked, in fact more that shocked. Armor was horrified. But what was worse than all of this, was that he didn't burst in the room to stop his daughter. He continued to stand there, and watch. Flurry was suppose to be too young to know about sexual education, or even how most of her body works. So how could she have known about something like masturbation. Armor's answer came in the form of the notebook floating in front of Flurry's face. It was not only one of Twilight's old school notebooks, but it was the one she had when she took Sex Ed in High School.

'I must've mixed it into the other books by mistake!' Armor thought to himself in a panic. 'I have to go in there and stop-'

"Big Brother." Flurry moaned, interrupting Armor's thoughts. "Big Brother's cock is so big." As Flurry continued moaning what she read in the notebook, her hoof continued to rub at her pussy. "Cock...I need your cock big brother."

'What is she saying?!' Armor thought, his mind in more of a panic. 'Unless..." Expanding his spell further into the room, Armor was just barely able to see every detail of the notebook. But what little she could see, it was small scribbles of Twilight's hoofwriting, and it was of erotic thoughts towards him. 'Twiley was having fantasies of me?!'

Despite Armor's disgust by all of this, he could partially feel his sheath pulsating. His cock slowly sliding out. Armor wanted to burst in the room now more than ever, but how his daughter looked. How her small pussy glistened with underage juices. It was making Armor hard. He hated it, yet one of his hooves couldn't resist gently rubbing at it. Taking a quick look around, Armor saw nopony was around, nopony would interrupt him masturbating to his own daughter masturbating. As Armor continued to rub himself with an increased rhythm, he could still hear Flurry reciting what she read on the notebook.

"Big Brother...and Cadance..." Flurry moaned, still unaware of how wrong what she was doing. "Cadance can't please your big cock...like I can..." Flurry continued to moan in pleasure as she kept reading. She wasn't completely sure what she was reading or why she was reading it aloud. But if these books came from her Auntie Twiley, they couldn't be bad. "Pictures look funny...my..p..pu...pussy feels funny." As she continued to rub herself, Flurry rolled on her back, then spreading her legs. "What does it feel like?"

'Okay, That's enough!' Armor thought, bursting into the room. "Flurry Heart! What are you doing?"

"Daddy?!" Flurry said, getting to her hooves and galloping to her dad. Holding up the notebook, Armor could see a drawn image of himself fucking Twilight from behind. "Auntie Twiley's book shows sex...what's sex?" She then looked down and saw Armor's still raging boner. "What's cock used for?"