Chapter 3: The Box

It was the big day. According to the delivery tracking information, the HypnoBox was due to arrive that morning between 9 and 12. Unfortunately it was a school day. That meant that Bart would have to skip school, so that he could wait for the package and swipe it from the doorstep before Marge. If anyone got their hands on the HypnoBox before him, it would jeopardize his entire plan. Because Lisa always used the same bus as him to go to school, he came up with an excuse, saying that Milhouse's dad was going to give him a ride.

When Bart left through the front door, he immediately ran around the house to the backyard and climbed up to the treehouse. There, he took off his signature orange shirt and blue shorts and replaced them with camouflage clothing. Then he ran back to the front yard and disappeared into the bushes near the door. Thanks to his small size he was able to hide himself completely by kneeling down. Plus the camouflage pattern of his clothes helped him blend in, so there was no risk of being seen. It wasn't the most comfortable hiding place for a stakeout, but it had to do.

The boy quietly observed as Homer drove off to work on the pink sedan. After a few minutes, Lisa walked outside and went to wait at the bus stop on the sidewalk. She was reading some kind of book to pass the time. The young boy crawled a little closer to the edge of the bush. Lisa was too absorbed in her book to hear the rustling of the foliage. From Bart's low position he was able to see occasional glimpses of the little girl's panties as she shifted her weight from one side to the other.

Bart pulled out his phone and zoomed in to snap some photos. Compared to her sleeping pose, Lisa's ass looked even better when she was standing. The buttocks supporting her weight took a tighter shape and the slight upward angle accentuated her subtle curves.

Ahh, I wish I could bury my face in those little hills.

Lisa closed her book with a sigh. "I wonder what's been up with Bart lately. He's been acting so weird."

Bart gulped. Why was she talking to herself about him all of a sudden? Did she know that he was skipping school? And more importantly, did she know that he was lurking in the bush taking photos of her butt?

"Woops," Lisa said. It looked like she had dropped her bookmark on the sidewalk. "How clumsy of me."

Bart gulped again, his hands shaking with the phone, ready to snap a once-in-a-lifetime picture. Lisa wasn't known to be a klutz. Was she on to him? Was she deliberately teasing him? Either way, he could not pass by this opportunity. Lisa slowly bent over to pick up her bookmark. Her orange skirt rose up and her full ass cheeks came into view. This wasn't an innocent panty shot anymore, it was a full-on invitation to admire the view. Lisa's flawless yellow skin was gleaming in the morning sun. Her behind looked like a pair of small, golden bowling balls colliding. Her panties were skintight, showing clearly the outline of her plump elementary school pussy.

Bart was not able to masturbate while lying down in the bush, but he continued taking picture after picture. Unfortunately the spectacle ended when Lisa had picked up the bookmark and straightened her back.

"Achoo!" Bart sneezed.

No, no, no! Why now?!

"Hmm?" Lisa looked over her shoulder. She then walked toward the bush with the book in hand. "Bart?" she called.

Bart didn't respond and was absolutely motionless. She was standing only a few dozen inches from him, but the bush provided enough camouflage, so she couldn't see anything. Bart scrambled to pull up a sound file he had recorded of Snow Ball meowing.

"Meow."

"Oh, it was just a cat." Lisa shrugged. She turned around and put her backpack on the ground. She opened it and bent over to put her book inside. Now that she was practically next to him Bart didn't have to zoom in on his phone camera to get a good shot.

I wonder… did she come closer to give me a better view? Is she trying to tell me that she's okay with what I'm doing?

Even after the book was inside, Lisa kept fumbling inside her bag, taking her sweet time to give her brother a good eyeful. "Hmm… now where did I put my phone?"

She wants it! She's telling me to do it.

Bart put away his phone and stood up in the bush. He didn't care about the noise he was making anymore. Lisa was basically giving him permission to cum on her panties, so he had to be quick before the school bus arrived. The horny young man dropped his camouflaged shorts and started stroking. Lisa was swaying her hips seductively from side to side as she kept digging inside the bag.

There's no way she's still looking for her phone. She knows I like her butt. She's gotta know it. I don't know when she figured it out, but she knows.

Bart wasn't worried about being caught. He had scouted an escape route at the back of the bush, and the foliage was near impenetrable from where Lisa was standing, so even if she were to try and peek in, he'd be long gone by then.

Now that I think about it, Lisa probably doesn't know much about sex. Bart thought. She might be booksmart, but whenever we watch movies together, the dirty jokes seem to fly over her head. She might read at a high-school level, but she has an elementary school girl's understanding of sex. She knows that guys like boobs and butts, and that to make a baby you put a penis into a vagina. But I don't think she knows what semen is necessarily.

Maybe it was better that way. If this whole erotic situation was just a really lucky coincidence, it was better that Lisa didn't know what the sticky white slime was that would soon cover her bottom. She'd probably just think that she had sat on something funny.

Whether or not she knows what's going on, I'm gonna do it. Mrs. Krabappel stopped me from cumming to my sister's ass yesterday, but now I'll do it for sure! I'll give her a twice as big of a load for making her wait.

"Hmm, it should come soon," Lisa said looking at her watch. She was obviously talking about the bus, but her word-choice couldn't have been more ideal for her brother who was on the brink of orgasm.

She said the word 'come'! She knows about semen. The bus isn't the only thing that will come soon, you little buttslut. Thank you, Lisa. Thank you for being my sister. Thanks for letting me cum all over your panties!

Bart pushed his hips forward inches from Lisa's invitingly unprotected rear end and ejaculated two shots of thick and hot semen on his little sister's plump, yellow ass.

Ahh, take it, Lisa! Accept my brotherly love! I'm marking you with my scent. You're gonna smell like my cum for the whole school day.

His aim hit the upper half of her left butt cheek and the inner middle part of her right cheek. The whitish semitransparent streams trickled down steadily, soaking her panties. As if on que, Lisa closed her backpack and stood straight again. She brought a hand down to her hips and touched one of the cumtrails that sparkled against her smooth yellow skin. She brought her soiled hand in front of her face and sniffed.

"Eww… what's this? Raw egg? How did I sit on an egg during breakfast without noticing? Why was there an egg on the chair in the first place? Must've been one of Bart's stupid practical jokes. No wonder he wanted to leave early this morning. Carpooling with Milhouse and Mr. Van Houten, my foot! He just wanted to bail before I found out about his prank."

Bart was confused. For a moment he had been certain that Lisa had been deliberately teasing him, but now he wasn't so sure anymore. Accusing him of pulling childish pranks against his own sister? How absurd! He would never do something like that.

Lisa looked conflicted. "I don't have time to go back in the house and get a napkin. The bus will be here any second now. But I can't go sit down on the bus like this either."

She pondered for a few seconds. She then brought her left hand to her ass and scooped up the remains of her brother's lovejuices that hadn't yet dripped on the ground. She bought her cupped hand with a small pool of semen in front of her mouth and started licking it clean.

¡Ay, caramba! She's actually drinking it.

Lisa gulped down the clear liquid with an expression that was hard to read. It didn't look like she particularly loved or hated the taste. The semen created sticky strands between her smacking lips every time she opened her mouth to lick her hand. She almost reminded Bart of a cat washing itself. The young man had just cum, but the vision of his bookworm of a little sister swallowing his load immediately made him hard again. Sadly, just then the school bus arrived. Lisa got on board and Otto drove away.

Damn… that was incredible. I'm almost starting to think that I don't need this HypnoBox-crap at all. My sister might be a bigger pervert than I gave her credit for.

Waiting in the bush was boring now that Bart had no visual stimulation to keep him awake. He spent time by browsing his collection of fap material that had considerably grown in the past couple of days. Soon he wasn't going to need any of that, though. If the hypnotic device was as effective as the people online were saying, he would never have to masturbate again. Nor would he have to discreetly sexualize his mom and sister. They would voluntarily present themselves for him whenever he desired.

After two hours of waiting, the delivery man finally arrived. It was that pimply teenager who seemed to change jobs every few weeks. He left the soccer-ball sized box on the doorstep and drove away. Once he was out of sight, Bart exited the bush and scurried to the doorstep to snatch the box. While avoiding being seen through the windows, he went to the backyard and climbed up to his treehouse. He was practically squealing with anticipation as he started to unbox the device.

Soon it was in his hands. The minimalistic black box appeared to be made out of cheap Chinese plastic. It was the size of a Rubix cube and really did not seem like the technological marvel it was advertised as.

"What the hell is this crap? It looked much cooler on the website!"

He was worried that he might have been scammed. But it didn't really matter what the device looked like as long as it worked correctly.

"Hmm, let's see how to use this thing," Bart mumbled to himself, starting to flip through the instruction manual. The HypnoBox's operation seemed simple enough. You just flipped on the switch and started giving suggestions. The manual offered multiple phrases that were found to be particularly effective. "Could this really be that simple? I really should test it on someone before I use it on mom and Lisa…"


After the school day had ended and Homer was off work, Bart invited his old man to the park with him for some good old father-son time. Homer was happy to oblige. He might have been a lazy deadbeat, but he did seem to genuinely want to improve their relationship. As incompetent as Homer was at everything he did, he wished to be respected by his only son. Bart found them a private canopy far away from all the other parkgoers.

"So why did you invite me here, boy?" Homer asked. "Did you wanna play catch with your old man?"

Bart pulled the HypnoBox out from his pocket. "Actually, dad, I wanted to show you this."

"What's that? Some cheap McDonald's toy?" Homer said, scratching his head.

"We will see about that," Bart said, crossing his fingers. He flipped the switch. "Dad, would you be mad if mom cheated on you?"

"Marge is cheating on me?" Homer squealed.

"No, this is just a hypothetical scenario."

"Whew, thank goodness. Well, to answer your question, of course I would be mad. And if I found the dirty scoundrel who stole my wife, I'd…"

Homer was shaking his fist at this imaginary villain while grinding his teeth with rage.

"Well, what if I told you that you couldn't be mad?" Bart said. Homer froze for a second. He had a blank look in his eyes as if he was sleeping with his eyes open.

"Well, if you told me, son, then I would not get mad," he said in a totally calm tone. Bart's eyes flew right open. The hypnosis was actually working.

"So if I tell you to never get mad again, you won't?" Bart asked. "No matter what happens, you will never be mad at me, mom or Lisa."

"I'll never get mad again, son," Homer replied like a lifeless puppet.

"Promise?"

"Promise."

"Hey, fatso."

"What is it, son?"

"You look like a balding fairy and your breath stinks."

"I cannot dispute that. Perhaps I should stock up on breath mints and go on a diet," Homer answered with an emotionless and robotic intonation.

Bart was having way too much fun. But it was time to get to the point.

"So, you won't get mad if mom cheats on you?"

"Even if Marge cheats on me."

"Even if she cheats on you… with me?"

"Even if she cheats on me with you."

Bingo! I'm sorry for doubting you, HypnoBox. You really are the real deal!

"And Lisa," Bart kept going. "You won't get mad if I have sex with Lisa?"

"I won't get mad."

"Will you let me fuck mom and Lisa every single day from now on?"

"Yes, Bart."

"And you don't get to touch mom anymore. She's my slut now."

"Marge's your slut."

"I'll even fuck her ass. I'll turn her into a total anal whore."

"Your mother's ass is yours to fuck."

"Good, glad we're on the same page."

Bart thought for a moment. He had set up a situation where he could engage in incest without having to worry about his father finding out. But Homer was still the breadwinner of the family, so he was needed.

"And you will continue working at the power plant," Bart said. "You will work hard every day and bring in the dough."

"I will bring in the dough," Homer repeated.

"Fantastic! I'm glad we had this talk, dad. Now let's go home and let mom and Lisa know about our new living arrangement."

"Yes, let's."

Bart grabbed the HypnoBox from the table and the two started heading home. Bart was frolicking all the way to the car. Soon he could make all of his filthy fantasies come true and nothing could stop him.