Chapter 3

A fine lather of sweat had formed on the girl’s bodies by the time they completed the tedious chore. They both had committed themselves to a lengthier bet than either had initially imagined. The sisters continued to talk about the game. They had worked up their enthusiasm to continue messing with their brother’s head. They both agreed on ways they would try to liven things up by pretending to fight his control over them if he pushed them too far. They wanted Justin to really work for it if he was going to humiliate them both.

Their little brother had spent his time preparing more test cases in his notebook while the girls toiled in the hot sun. “Drink this tea. You look dehydrated,” he met them at the door and pretended to be concerned for their well-being. He was mostly worried that the suggestible state he thought they were in did not wear off and ruin his experiments.

“Meet me in your room,” Justin commanded. He was growing in confidence now that he felt confident the mixture was working.

“Can we take a shower first?” Tyra asked as she drank the tea.

“No,” Justin noted. He wondered if the tea was starting to wear off. The girls had been gone for a long time.

Tami noticed how assertive Justin was with his older sister. It was unusual for her not to take his head off if he was snotty. She blithely followed him into her room.

Tim was sitting on their bed, leafing through the notebook. He had helped his brother come up with naughty dares.

“Remove your shirts and toss them in the dirty clothes,” he said. The girls complied and revealed their perfect naturals.

“Remove your panties,” Justin instructed the girls to remove the panties but waited until they were about to toss them into the hamper before telling them to put them in their mouths. The girls were reluctant and looked disgusted by the idea of sucking on their own sweaty panties.

“C’mon, Justin. That isn’t fair,” Tyra said as she stuffed her panties in her mouth. She liked the taste of her pussy but even she was overwhelmed by the musky scent of her sweat.

“You will refer to me as Doctor Riggins or Doctor while in a suggestible state. What is my name, Tyra?” Justin asked.

“Doctor Riggins,” Tyra said the words as if she was trying to resist the urge to say them.

He asked the same question of Julie, and when she answered, she acted like she was trying to claw the words back into her mouth. The girls were actually having a little fun with the game now.

“As your Doctor, I have your well-being at heart. I have every reason to see you nude during our experiments. You will remain naked in this room unless I instruct otherwise. You are a test subject, and this is a clinical study. Do you both understand?” he said.

“Yes, Doctor,” the girls repeated together as if in a trance while mumbling with their panties in their mouth.

“Tim is my lab assistant. If he assists in my tests you will not resist him. He is no threat to you. He must observe these tests. Do you both understand?” Justin asked.

“Yes, Doctor,” the girls repeated. They both rolled their eyes. Justin noted that his subjects were compliant, but their body language often reflected their real desire not to obey him.

“Face each other and spread your legs apart,” Justin ordered the girls to take a position opposite of one another in the bedroom. They did as they were told.

“Bend over and grab your ankles,” Justin instructed them.

Tyra balked but did as she was told. Justin smacked her bottom with a ruler. She jerked in surprise. She didn’t expect him to do that. It bruised her ego much more than it did hurt her bubble butt.

“This is a clinical trial, and you are a test specimen that does what she is told. You have no modesty in this room. Spread your legs wider. You will be introduced to pain if you fail to comply. The pain is not harsh. It is a corrective measure to ensure compliance,” Justin said.

Tyra rolled her eyes. She knew that it was just an excuse to look at her pink little poop hole and pussy lips as she bent over.

Justin provided an example about training a mouse to run a maze. “The test subject is introduced to minor electrical shocks when they turn down the wrong corridor. They receive a reward when they reach the end of the maze. This reinforcement improves the test completion time after repeated exercises,” he said.

Tyra did not listen to a word he said. “Lift your head and get move closer so that your faces are almost touching,” Justin instructed the girls to come close enough to kiss. They waddled closer. He removed the panties from their mouths.

“Stuff this into your pussy,” Justin handed the girls their soaking wet pussies.

“Are you supposed to say pussy during a clinical trial?” Julie asked as she reluctantly began to wad the panties into a ball and push them into her tight pussy.

“Test subjects must have clear instructions in words they can understand. I am speaking in colloquial terms for your benefits, Julie. You will now respond to Test Subject B. If I return to you as subject B or test subject B, you will answer to this name. Do you understand, Test Subject B?” he asked.

Tyra groaned but said she understood. Justin told Tyra she now test subject A. “At least I am A and not B” Tyra chuckled. She was not afraid of pushing the wadded up panties into her wet pussy.

“Push the panties all the way into your pussy. I don’t want to see the strap hanging out. How does that feel, Test Subject A?” he asked.

“Not good,” Tyra grunted. The panties were uncomfortable but not unbearable.

“Would you like it if I told you to remove them,” he asked.

“Yes, Doctor,” Tyra played along.

“How does it make you feel if I tell you that you can’t remove them,” Justin said.

“Like punching you in the face,” Tyra snickered.

“Why haven’t you tried to punch me in the face?” Justin asked.

Tyra didn’t want to admit that she agreed to all of this on the pretense that her sister would chicken out, and then she’d own her ass when she did. “I am your test subject. I can’t hurt you,” Tyra said.

“Fascinating,” Justin scribbled some things down on a notepad. “You didn’t try to kick my ass before I told you that you were my test subject,” Justin observed.

Tyra had no explanation for that. “I might when this tea wears off,” Tyra fully planned to get even with her little brother. She was humoring him and playing his game, but with the intent, she’d win the bet. She already had a list a mile long, forming in her head of ways she was going to get even when it was all over, and she had what she wanted from Julie.

“You like my tea. You love it. You crave it so much that you cannot see a life without it,” Justin said. “You are willing to do anything I tell you and subject yourself to my experiments if I will give you more tea,” he added.

Justin made the girls say they understand.

“I want you to kiss each other,” he said. Tyra had made out with other girls at parties. It wasn’t her favorite thing to do, but she knew it turned guys on, and she liked to seem daring. Julie had never made out with another girl, and she definitely didn’t want to kiss her sister.

Justin smacked Julie’s bottom first with the ruler and left a nice pink mark on her perfect ass. Julie opened her mouth, closed her eyes, and pictured Brad Garrity. A hunky senior that hung out with Tyra.

“Keep your eyes open and look at each other,” Justin said as he walked in circles around the girls randomly smacking their butts. “You enjoy kissing each other. You see it as a reward. You will not kiss each other without my permission. You will obey me so that I will permit you to make out with each other,” he said.

“Oh man, this is fucking awesome,” Tim was secretly recording this on his cell phone and getting aroused. Tyra and Julie kissing in an extended make-out session was incredibly hot even though they were his sisters. Tim had no trouble getting girls of his own, but he was strangely aroused by this. “I have the most awkward boner right now,” he said.

“Gross! We are test subjects, Tim. This isn’t supposed to get you hard,” Tyra teased Tim. She knew Tim was in on the joke, and he was playing along. She was happy. Tim was there because he was her inside man. He could look out for Tyra’s interests and be a voice of reason if Justin went off the deep end.

“The tests involve sexual stimulation and arousal. Your nipples are getting hard, and your pussies are getting wet. You want to play with them, but you cannot,” Justin said.

Tyra was shocked that her pussy was getting wet. It may have been that Julie was such a delicate kisser or that her body was pumping all this adrenalin from being watched. She really did want to fiddle with her clit and play with herself.

“Please, Doctor, can I touch my pussy?” Tyra asked. She was half-joking and half serious. She knew she’d have to do some freaky shit to win the game, or her sister would never quit.

“No, Reach under test subject B and pull her nipples. Test subject B pull Test subject A’s nipples the same way,” Justin said.

Tyra had never been denied in bed. If she wanted a guy to go down on her he always did. She wasn’t used to being told she couldn’t do something when she wanted to do it. The very thought was making her wet for reasons she did not understand.

“Damn it, I am not a cow, Julie! Don’t try to milk me,” Tyra complained when Julie reached under her and begun to tug her sister’s nipples like cow teats.

“You will refer to Julie as Test subject B in this room,” Justin smacked his sister hard on her ass. Tyra seethed with rage and hissed. She almost grabbed that ruler and shoved it up his ass. Instead, she apologized to him. A few minutes later, she started to feel a tingling sensation on her bottom that also felt good for reasons she didn’t understand.

“Whose toys are these?” Justin held up two medium-sized dildos.

“You little fucker. You were snooping through our room!” Tyra didn’t have to admit they were her sex toys. It was pretty evident from her reaction. She had gone to great lengths to hide them. She assumed that meant they also found her weed stash, and Tim probably had that as well.

“This room is now a test laboratory, and everything in it is part of your tests. You will only use these phalluses when I tell you,” Justin said.

“Phalluses?” Tyra balked.

“Dildos,” Justin corrected himself as he remembered that he had to phrase things in terms his sister would understand.

“Rubber ding-a-lings,” Tim added.

“I know what they are, Tim!” Tyra said sarcastically while continuing to lock lips with Julie.

“Do you like to use these dildos on your pussy or put it in your ass?” Justin asked his sister.

Tyra sneered and said that obviously, it went in her pussy.

“You are both now curious about sticking things into your butts. You both want to sit on these dildos and see how far they can go into your ass. You will stop kissing and pick one. You will sit on the floor and spread your legs apart for me,” Justin said.

Julie glared at her sister. The glare only strengthened Tyra’s resolve to collect on the winnings. She felt Julie was close to quitting the game, and this might be the end of it. She was no stranger to anal sex. This would be a piece of cake for her.

The girls sat on the ground facing up with their legs spread apart so that their pussies and assholes were visible.