Chapter 6

“Hurry up and shave that furry gash so I can eat that pussy without getting hair stuck in my teeth,” Tyra teased her sister. They were in the bathroom, taking a long bath and shaving their legs and pussy.

The door to the bathroom was wide open. They had been naked in the trailer for hours, and their mom hadn’t come out after she and Buddy went to bed. There was this constant thrill of the possibility of being caught by them at any time that had made the experience extremely hot to both of them.

Buddy or Tami might still come out of the room and catch them playing with themselves and cavorting around naked in the bathroom. Tyra was prepared to yell at Buddy and call him a perv for not knocking if he did or act like it was no big deal if Tami caught them.

The both shaved their pussies bald and all the peach fuzz off of their ass cheeks as well.

Justin or Tim periodically checked on them. Tim still didn’t have a lot of authority, but he could tell his little brother.

Justin made the girls take turns spanking each other’s asses 20 times with the paddle brush. He told them they could stop anytime they liked, but the person who did would have to run laps around the trailer 20 times in the nude.

After seven rounds, neither girl’s ass or willpower gave out. Justin declared it a draw and made both girls run laps around the trailer. It was dark, but there was a street light. Anyone could have caught them dashing around the trailer with tits bouncing and asses jiggling in the night air.

Tyra lamented she could be out getting a lot of strange dick and partying instead of doing this.

“No, you prefer to be the subject of an experiment. You will only leave the trailer to go to school or with my permission,” he told them both.

“Yes, Doctor,” they could barely contain their giggles. The very nerve of their brother telling them where they could and could not go made Tyra angry and frustrated. She vowed to get even with him after this was all over, but for now she would not go out of the house without his permission –even if it meant her best friend fucked her boyfriend while she missed his party.

He forbid the girls to look at their cell phones. “Anytime you think about looking at your cell phone, I want you to picture my delicious cock sliding inside of you instead,” he said.

“Why don’t you go ahead and fuck us both already? You know you are going to do it eventually,” Tyra dared him to plow her. She wanted Julie to hear her say it because she hoped that her little sister would finally chicken out.

“Yeah, you already finger fuck us, make us give you blowjobs. What are you waiting for?” Julie didn’t back down.

“Do you want me to fuck you?” Justin asked his sisters.

“No,” Tyra said sternly. She looked angry that he would even suggest it. “You are going to anyway, though. You can make us do it,” Tyra said.

“Yes, but I am not ordering you to do it. Do you want to fuck me?” Justin asked.

The girls seemed confused. “If you tell me to fuck you, I will,” Julie stammered.

“I am telling you that you can beg me to fuck you if you want me to do it,” Justin replied coyly.

The girls seemed confused. They expected he would try to fuck them.

That night he continued his experiments and fed them more tea. Tim and Justin pissed in their mouths, and the girls sucked their dicks right after. Justin made the girls gargle his cum and blow bubbles with it.

“Pretend you have rabies and let me see you foam at the mouth,” Justin made the girls pretend to be dogs and crawl on the ground while they blew bubbles with his cum and let it drip down their chests on their tits.

Tim took photos, and the girls didn’t complain about it. He was shocked that they didn’t at least warn him not to try to blackmail them later or demand he delete the photos.

When Justin was finished with the girls, he put them into a sixty-nine position on the bed and removed the dildos from their asses. “You will want to put these in your ass tomorrow. You will ask me if you can when I wake you up. I won’t let you until you have your medicine. You will open wide and swallow every drop I pour down your throats,” he said as he patted them on the head.

“Lick each other until you fall asleep. My lab assistant or I will check on you. You will not mind that. You will want to continue the experiments tomorrow,” he reminded them as he flicked out the lights and shut the door to their bedroom.

“yOu wIll wAnT tO cOnTiNuE tHe eXp1rImEnTs,” Tyra mocked her brother’s high pitched voice as soon as he closed the door on them and began to lick her sister’s thighs.

“Yeah, the nerve of that little fucker!” Julie groaned and wiggled her hips so that her freshly shaved pussy was right over Tyra’s mouth.

“What are you complaining about? You get to be on top. Why does Test Subject B always have to be on the bottom?”

“Less talking, more eating, Test Subject B,” Julie wobbled like a bowl of spaghetti over her sister. It pushed her nose into Tyra’s pussy so she could nibble on her clit the way she liked.

Back in Justin’s room, he was getting ready to sleep. The boys didn’t share a bed. Tim had long since outgrown his twin bed, but his mother couldn’t afford a better one, and the room was simply too small for a larger bed.

“We should go back into the lab and sleep with Tyra and Julie,” Tim couldn’t stop thinking about his horny adventure today.

“We don’t want to interrupt the experiment. You can check on them in a few hours if you like. Wake them up and see if they start naturally eating each other out or if they wait until you tell them to do it. Just let me know the results in the morning so that I can chart their behavior,” Justin said.

“Dude, I have something to tell you,” Tim didn’t want to spoil his sister’s games, but he felt it was time that his brother knew they were just playing with him. He wanted to tell him that none of that was really real and that the girls would basically do anything he wanted just to see how far he’d go.

“I have something to tell you first,” Justin admitted.

Tim told him to go ahead and tell him first. He wasn’t sure he wanted to ruin the illusion for Justin anyway. His little brother was having fun, and he had come out of his shell so much that afternoon that things would never be the same between them.

“Tonight at dinner I dosed mom with the tea,” Justin felt bad about it.

“You perverted little troll,” Tim smiled. “Were you going to order mom to undress and become Test Subject C?”

“No,” Justin said as if that idea was unthinkable.

“Why not? You dosed your own sisters. It’s all for Science, right?” Tim teased him. “You could order Mom to strip and bark like a dog,” he said. Tim would have liked to have seen his mother’s reaction when Justin did that, and she chewed him a new asshole.

“Point taken,” Justin felt incredibly guilty about his admission. “I just wanted to see if the formulae worked on her. There are times I think my sisters are putting me on and faking some of their reactions,” he said.

Tim was about to confirm for him that they were definitely putting him on.

“The research would be hopelessly tainted and worthless if they do not react naturally to the formulae I am giving them. I was going to instruct Mom not to mind if we conduct any research around the trailer. I doubt Buddy would mind,” he said.

“That dirty old fuck would love it!” Tim agreed.

“I told Mom to bring me some water, but she got mad at me,” Justin said.

“Tyra and Julie get mad at you all the time. Do you not hear them call you Professor Pencil-neck?”

Tim said.

“That is true, it is worth conducting further experiments. The dose may not have been right,” Justin said as he drifted to sleep. He had a nightmare that night about Fleischmann–Pons’s Nuclear Fusion. He had invented a form of cold fusion that was a kind of nuclear reaction that would occur at relatively low temperatures compared with hot fusion. There was a craze in the scientific community about his discovery. It involved shoving cock-shaped electron rods up his sister’s asses and down their throats. The girls glowed blue, but in the end, he could not get the same results and became a laughing stock of the scientific community.

Even his sisters thought it was funny, and they had mutated into 50 feet tall glowing women who towered above him. They wore no clothes because their bodies radiated with a blue radioactive field. They picked him between their finger tips and flicked him across a football field because they were angry at how he had changed them for no real benefit to mankind.

In the morning, he woke up with a huge boner. He immediately went to his sister’s room to piss in their mouths and get head, but they were not there.

“Justin? Is that you?” Tami asked from the kitchen. Justin panicked but answered his mother and went into the kitchen. Julie and Tyra were both in white t-shirts giggling and cleaning up the kitchen.

Buddy watched Julie bend over to scrub the oven. Her t-shirt hung open, and her entire ass was visible. She didn’t have her dildo in place, but it was pretty obvious she didn’t care if her mother or Tami saw her bottom. The girls were being incredibly flirtatious with Buddy and hanging on his every word. Tyra had pussy juice dripping down her thigh.

“I don’t know what you put in that tea last night, but your Mom rocked my world,” Buddy whispered playfully into Justin’s ear as he admired his sister’s shapely little teen ass.

“Yeah, let’s talk about that tea,” Tami said. She clearly overheard Buddy. She didn’t look happy at all. She was actually pretty livid.

“What about it?” Justin swallowed hard.

Tyra and Julie could not contain their giggles. Tyra smiled like a shark that just spotted its next meal.

“Do you think your sisters are acting a little weird today?” Tami confronted Justin.

“It’s just part of an experiment,” Justin said.

“Oh, is that what this is?” Tami asked rhetorically. She turned to her daughters and asked them, “Do either of you have panties on?”

Tyra and Julie didn’t hesitate to lift their shirts and let them asses show for a split second before returning to cleaning. It was a demonstration for Justin’s benefit. “This is the third time they did that this morning. Do either of you have panties on?” she said.

The girls repeated the exercise. Buddy still had no idea what was going on, but he liked it. Tim was just waking up, and he stretched. He was wearing just underwear to the table. He did that quite often. He had an amazing body, and he didn’t care.

“Did you give Tim the tea as well?” Tami asked Justin. “What is in it? You gave me the tea as well!”

Justin quickly ascertained that Tami didn’t know the entire story yet.

“I did give the tea to Tim, but it doesn’t work on men,” Justin admitted.

“What exactly does it do?” Tami put her finger in her son’s face and became quite angry with him. This was no harmless prank as far as she was concerned. If he was giving the girls some dangerous drug there could be serious side effects, and she wanted him to understand that.

“Stop, do not get angry!” Justin reacted defensively.

“Why shouldn’t I be angry?” Tami asked more calmly. She was still waving her finger at him.

“Put your hand down,” Justin said.

Tami put her hand down and appeared surprised. Her behavior shocked Julie and Tami. She must have overheard them talking about the bet and was trying to teach them all a lesson by playing along. They continued cleaning but watched to see if they were going to be implicated or if Tami was only mad at their little brother.

“Lift your left leg,” Justin instructed his mother.

“How are you making me do this?” Tami lifted her leg slightly.

“Lift your leg higher and bend your knee,” Justin said.

Tami was not as limber as her daughters, and she struggled to raise her leg higher. She looked angry, shocked, and confused.

“Test subject A and Test subject B stop cleaning and stand up,” he said. His sisters stood up and stopped cleaning. “Remove your t-shirt,” he said.

The girls couldn’t believe they were being told to do this in front of their mother and buddy. If he was going to go down in flames, they would finish the bet. If either of them quit now, it would be all over. Tami might be playing along, but she would never permit them to stand naked in front of Buddy.

Once they had their shirts off, he told his mother, “Julie is Test Subject A, Tyra is Test Subject B. I am the Doctor, Doctor Justin, or Doctor Riggins. Those are our names. When Test Subjects are naked, that is fine. You are okay with that. You do not mind because they must be observed in the nude to determine their physical reaction to external stimuli. Do you understand?”

“No, not really,” his mother looked ashamed and afraid.

“Test subjects must be naked because I want to see if they get turned on when they get touched or if they are repulsed. I can measure their arousal by fingering their pussies, measuring how hard their nipples get, checking their pulse, observing them for goosebumps, blushing, and so on,” he asked her again if she understood.

“Yes, I guess so,” Tami looked pleadingly at her daughters.

Justin reached into the fridge and pulled out a carton of pre-mixed tea. “This is medicine. You like this, but you will not drink it unless you are instructed by me or one of my lab assistants,” he said as he poured three cups. He told his sisters to drink theirs. He handed the cup to his mother and told her to drink all of it.

Tami reached out with her hand. It was unsteady and shaking like she was fighting the urge to take the tea.

“Oh c’mon, mom, drop the act,” Tyra chuckled as she finished the tea and opened her mouth wide to show her brother that she drank it all.

“I am not acting, are you?” Tami looked horrified as she guzzled the entire glass of tea. She wanted more.

“Yes, it’s just a fucking game. We wanted to see how far this little pervert would take it. We totally underestimated him,” Tyra started to explain how they assumed he’d want to see and touch their tits, but they had no idea they would be caught up in his experiment.

“Stop talking,” he told Tyra. She shut up. “Put your thumb up your ass and stand at the table in front of Buddy. You as well Test Subject A,” Justin said.

The girls jammed their thumbs into their asses and stood right in front of Buddy. Their thighs were touching his knees as he sipped his coffee. “Wow, is this another one of your insane tests to see if I am more into your daughters than you?” Buddy joked. He still believed this was all some sort of play-act and that maybe Tami was jealous enough of his attention of her daughters that she put them up to this to see how he’d react.

“No, I have no idea what is happening,” Tami admitted.

“Unbutton your blouse and remove your top,” Justin said slowly to his mother. She looked horrified but started unbuttoning her top. Once she had it off, he told her to unsnap her bra and remove her skirt as well. Once she was in panties, he told her to take those off and stuff them in her pussy. Tami had recently shaved her pussy, and her snatch was slightly red. It was something spontaneous she decided to do this morning.

Justin observed that the tea must have worked. “I mixed in an aphrodisiac with the compound. It lowers inhibitions but you only desire things you secretly want anyway. It isn’t the same thing as suggestions. You wanted a bald pussy and you got one,” he smirked.

“Justin, I am still your mother!” Tami sounded outraged that he would dare comment on her bald pussy.

“You are Test Subject C. You are part of an experiment and this trailer is the lab. You will not wear clothes in the lab unless I or my lab assistant permits it,” he said to her.

“How do I get one of those jobs as a lab assistant?” Buddy no longer believed this was a game or an act. He was too busy staring at the teen knockers in front of him to question it if it was.

“You must follow all of my instructions and never abuse your authority as a lab assistant. You must help me chart any observations. Can you do that?” he asked Buddy.

Buddy laughed and said, “If you are serious, then hell to the yeah.”

“Jam your thumb up your ass, Test Subject C. You like it when you are told to put things in your ass.” He said to Tami. Tami still seemed horrified, but she complied and put her thumb up her ass. She never gave anal to Buddy. It wasn’t because she didn’t like it. Her ex-husband used to love anal, and that made her think about him.

Justin programmed Tami and his sisters with the same instruction set. He gave them the four trigger words, including the one about his dick being the most delicious cock they ever saw. “It is simply majestic, and you love to look at it,” he said.

“Hey, what about me?” Buddy asked. He was still trying to process that this was happening for real.

“I follow Highlander rules. There can be only one,” Justin joked playfully. It was a nerd joke that went over Buddy and Tim’s heads.

“Yeah, dude, trust me. I tried. Don’t worry though, Lab assistants get their dicks sucked and get to piss in their mouths,” he said.

Justin said he made this mistake before with his other lab assistants. “They all wanted to have magnificent dicks. If all dicks are magnificent then they seem ordinary -It backfired. The test subjects still love cocks.They just prefer mine more,” he mused.

Justin unzipped his fly and pulled his dick. It looked huge to everyone else. He told his mother it was the most majestic cock she had ever seen. “How long is my cock, Tim?” he asked his brother.

His brother said it had to be about 15 inches long. Tim looked thoroughly impressed by his brother’s fat hog swinging between his legs. “It looks like a baseball bat,” he said.

Tim was totally comfortable looking at and talking about his brother’s cock. It didn’t make him uncomfortable.

“Really?” Justin smiled and waved his penis around.

In reality his cock was about five inches in length and very stubby. Buddy noticed right away that everyone else seemed to think he was hung like a porn star.

“Do I get to fuck the girls?” Buddy asked. He felt he might as well come out and ask the question that was pressing on his mind.

“Test subject C is yours at night. You can do anything you like to her, and she will obey you in your private lab,” Justin offered up his mother’s sexuality. He told his test subjects that his mother’s old bedroom was now Buddy’s private lab.

“What about Test subject A and B? Maybe we can have a little rotation?” Buddy grinned impishly.

If his girlfriend had set all of this up just to trick him into revealing he’d bang her daughters if given the chance then she would have stopped pretending at that moment and wrung his neck. She did look disappointed when he asked the question, but she didn’t do anything else.

“Yes, I don’t see why not. However, I must first determine if their birth control pills will interact with the formulae I have given them. Anal and blowjobs only until I am certain that they don’t build up any sort of tolerance to the tea.”

“Wait a minute,” Tyra demanded angrily as she stood in front of Buddy. He was playing with her tits and finger fucking while she held one thumb in her ass. “This was all a game. We were not really under mind control,” she said. She quickly explained that she was just waiting for Julie to quit so that she could stop playing.

Julie confirmed that it was a game and that she was not about to give in now.

“You are both convinced that you had some choice. I gave you that instruction earlier when I told you how magnificent my cock was. I told you to retain what I said, but not remember it was me that told you,” Justin admitted. He pointed out that he had installed an Alexa in their room and had recorded all of their conversations. He even played some back where the girls were telling Tim that they changed the rules.

“You told us all those rules?” Julie sounded betrayed.

“No, If I had made up the game, I would have made the rules far easier to understand. That was all contrived in your perverted little imaginations. You seemed to need a reason to participate in my experiments. You looked so betrayed and angry with me. I’ve been controlling you for weeks. I simply told you to forget the original experiments,” Justin explained.

Tami and Julie could not believe that. They had no memory of any past experiments. It did explain why neither of them had used their cell phones in a long time and how stretched out their assholes were already.

“When Test Subject C confronted me today, I did not have any choice. I had to put her into the experiment, or she would have ended them. I am sorry, Test Subject C,” he said.

“No, you aren’t,” Tami sneered vindictively. She could not pull her thumb out of her ass. It felt like it was superglued in place.