Experimentation (Closed)

[StFornicate]

It worked.

Oh holy fuck it worked!

Tommy could hardly believe it, even as he was experiencing it all for the first time. His experiment was a resounding success. He had cooked up a party drug like no other. This blew X out of the water. He lay in the bed, alone in his room, jerking his massive hard-on up and down for the fifth time. The pleasure was excurciating, amplified tremendously by the drug cocktail he'd consumed.

A blend of marijuana extract, cocaine, Ecstasy, and Viagra, he had never felt more alive, or more fucking horny, than in this moment...

*****

Two weeks later, Tommy had aced all of his finals for the semester and was heading back to his childhood home for the summer. All his shit was packed up in the back of the old pick-up truck he drove, but the most important things, his experiments, were carefully hidden away in his backpack.

He needed more information. He knew from trying it himself that the mixture was potent, and powerful. But, he knew, it wasn't really made for him. He needed to know how the female body would respond to the drug. He pondered how he might gather such information as he pulled up to his parents' house...

 

[zydrate]

Marisa was in her room, going over her awards and class pictures. She had just graduated from college and would be off to her first year at college soon. But first, she intended her summer to finally relax and have some fun seeing as how she refused to during her last year in HS.

Her brother Tommy was the genius, not Mari. No, she had to work at it just to live up to the high expectations her parents had for her seeing as how all she heard was 'Tommy is such a good student, why can't you be like him?'

Well, now that she had graduated with honors, her parents would be throwing her a graduation party tomorrow night. And yes, her brother would be there since he would home from college.

The same high class college Tommy was at.

Well, even if he was a year older than her, the last time Tommy saw Mari was last summer, when she hadn't matured yet as a woman, but now, she knew she had a great body but never really cared to show it off.

"Mari?!" Her mother called, "Tommy's home! Come say hi!"

With a huge sigh, Mari came bounding down the stairs. She was wearing a crop top shirt and a pair of cut off jeans which exposed her long legs. "Hey Tommy," was all she said before disappearing into the kitchen.

 

[StFornicate]

"Hey Tommy," was all Marisa had to say to him before sauntering off to the kitchen. Tommy just smirked, setting his bags down and hugging their parents. There was the usual barrage of questions, and Tommy did his best to answer them as innocently as possible before excusing himself and making his way up to his childhood bedroom.

He sighed, dropping his bags yet again. He didn't quite feel like he belonged in this room anymore. So much had happened in the last year!

He started unpacking; the night drew on. Pizza was ordered for dinner, and when it arrived he made his way back downstairs.

There was something about Marisa. She had certainly grown up, physically, maturing into an incredibly sexy young woman. The way her butt bounced back and forth when she walked, encased in those tight little shorts, made him wonder just how many guys had peeled those shorts off her tight ass.

He shook the thought away, although he knew his eyes kept drifting towards his sister's bit of displayed cleavage...

 

[zydrate]

Even if Mari wanted to ask Tommy something, her parents dominated the conversation so she just listened to the convo and ate her slice of pizza.

Then talks turned toward the off campus apartment she would sharing with her brother. Their mother pointed out that if their father was paying for it, their mom would chose were it was and then decorate it herself.

"Whatever.." Mari said and got up, "it's way to hot so I'm going to swim for a while..." She looked at her brother, "and seriously, welcome home Tommy."

A few minutes later Mari was out at their pool, wearing a modest bikini but with her huge chest, not everything ended up modest on her. This was probably why she had a lot of male friends but she always ignored their advances because deep down, she still considered herself a tomboy... If only she knew the truth...

 

[StFornicate]

Tommy smiled softly at his little sister. "Thanks Mari," he said, letting her wander off. He continued to make small talk with the parents, until a few minutes later Mari came waltzing by in her bikini, her tits nearly falling out of her top and her ass entirely too round and curvy to belong to an eighteen year old girl...

It suddenly occured to Tommy that a swim would be the best thing ever.

He excused himself, thanking his parents along the way before heading up to his room. He popped open his window and took a quick, stealthy hit off a glass marijuana pipe and blowing all the smoke out the window before stashing it again, and then peeled off his clothes and got into his swimming trunks, all the while completely forgetting that his sister, in the backyard pool, could see right into his room!

He headed on down, grabbing a towel along the way. The parents were heading to bed for the night.

"What's cookin', good-lookin'?" Tommy asked Mari with a chuckle as he came outside. It was a line they had said to each other repeatedly through-out their childhood, to the point of annoyance.

 

[zydrate]

Mari had only completed one lap when she stopped to get some water out of her eyes when she looked up and for some reason her gaze landed at Tommy's window and she saw him naked! Her breath caught as she saw his huge cock. Quickly, she turned away and went to sit on the edge of the pool as she caught her breath..

It's not like she hadn't seen a cock, hell, lately she watched a lot of online porn because it got her curious and it definitely made her horny but she hadn't found that one guy to lose her virginity to.. Maybe in college... If Tommy didn't turn into a protective older brother.

She heard foot steps and it shook her out of her daydream. She finally gave her big brother a sincere smile, "I thought you weren't supposed to swim right after eating..?" She teased him before disappearing into the water.

 

[StFornicate]

"Those are really more just... Guidelines," Tommy replied, in his most piratical voice, and chuckled. That hit of weed had been strong, and he was feeling quite good, even watching his sister slip away from him under the water.

He dove in after her, his legs automatically kicking under the water in time with his arms paddling, and he popped up out of the water at the wall, right in front of her, a mere moment after she did.

"You're lookin damn good, sis," Tommy said to her, a bit surprised himself that the words he'd been thinking had popped out of his mouth.

 

[zydrate]

"Shut up," Mari said at his compliment and splashed some water at him, laughing. She treaded water to keep afloat.

"So, how's college treating you, big brother?"

She stayed close to him, her boobs enhanced by the night time water which made her nipples erect.

 

[StFornicate]

"Oh, I can't complain," Tommy replied, appreciating the view of his sister's abundant cleavage bobbing in the water before his eyes, even as he did his level best to divert his attention!

"Not that anybody would listen anyway!" he said with a laugh, and splashing some water back at his sister.

He couldn't help it, the thought that sprang to his mind. She was the perfect specimen. The perfect test subject. He knew her better than any other woman, so he would be the perfect observer for how she responds to it. But how? How to get it in her system?

"Hey, want me to get us some drinks?"

 

[zydrate]

"Sure, some drinks sound great." She said before diving under the water and grabbing her brother's trunks and giving them a tug before swimming away and doing some more laps.

Mari loved the water and could swim like a fish. She had even joined the school's swim team for a while until it interrupted her studies and her parents made her quit.

 

[StFornicate]

Tommy popped out of the water, sitting on the edge and then standing up as his sister swam away.

His plan came to him as he walked away. It would be so simple.

Fix her a strong, fruity vodka drink. Dump a dose of his party-drug misture into it.

And observe.

Which is exactly what he did, sprinting up to his room as soon as he was in the house to grab the stuff, then back down to the kitchen, fixing them both similar drinks.

He made sure to hand her the one loaded with the drug cocktail when he got back out to the pool...

 

[zydrate]

Mari finished up a lap and was floating in the water when she saw her brother coming out of the house with the drinks. One thing she liked about Tommy is that when he got his hands on his first drink, he shared it with his little sister.

They had a bond that seemed to disappear after he left for college but now that she was going to be sharing an apartment with her brother, perhaps that bond would be renewed?

She swam over the edge of the pool and lifted herself up on the edge and sat down, her feet still dangling in the water as her brother sat down next to her and handed her a drink.

"Thanks," she said as she patted the spot by her, "So, care to tell me what to expect for my first year at the university?" she asked as she took a sip of her drink and tried not to make a face at the strong liquid as it burned going down her throat.

 

[StFornicate]

Tommy chuckled, sitting next to her and watching as she took a drink off the laced beverage. "Well, you can probably expect a lot of hangovers. Kids at this school really like to party pretty hard," Tommy said.

"No time like the present to learn how to hold your liquor, though, right?" he said, leaning back and taking a long drink from his glass.

This was shaping up to be a very interesting night. He couldn't really believe he'd actually done it, give his own sister the drug cocktail without her knowledge. Would she even know what hit her? Or how or why? How would she respond?

It might not be a bad idea to set up a hidden camera to record...

He smirked. "And it's not just booze on campus either. A lot of people do a lot of... other substances as well..."

 

[zydrate]

"You make it sound like it's a bad thing," she said as she took another drink from her glass. This time, it was a longer sip than last time and she succeeded in not making a face, the burn was a little less now though.

"So, are you one of these students that partake in the substances?" She was teasing him because he made it sound like he was giving a report about drugs and decided to be politically correct in calling them that.

"It's not like I don't know about drugs Tommy. I've never done any just because, well.." why didn't she do any? It was available in high school, just like drinking, but well... she was too busy trying to be like her brother. She downed her drink this time, probably out of frustration of trying to live up to their parents' expectations.

"What do you have planned this summer?"

 

[StFornicate]

"The trick is to just stay on top of your schoolwork. If you can keep them A's going, Mom and Dad won't ask any questions and will just keep sending you money when you ask for it," he said with a conspiratorial wink.

She asked him about his plans for the summer, and the alcohol had loosened his lips a bit and he started rambling about road trips and float trips and camping and backpacking and things...

All the while keeping a careful eye on his sister. The first strong effects of the drug cocktail should be hitting her any second now...

 

[zydrate]

Mari nodded as her brother talked about keeping her grades up. That was easier said than done seeing as how the work was easy for him...while she had to work at it.

"I--" she stopped as a warm feeling washed over her, "...-I--" she giggled and sighed as she shook her head, "Damn, is it hot out or what?" She hadn't realized that her speech had slurred just a little.

Looking at her brother, Mari smiled and leaned against her brother, putting her head on his shoulder and sighing, "You're really handsome Tommy...I bet you have a lot of girls chasing you..."

 

[StFornicate]

Tommy blinked, and slipped his arm around behind his sister's back to hold her close. Skin against skin. Her little bikini only served to emphasize her impressive tits, and it was all Tommy could do to avert his eyes.

It seemed the first of the drug had hit her, as expected. He shook his head and laughed off her statement. "They're not exactly banging down my door or anything," he replied.

It was true. Although he had met a few different girls at parties during the schoolyear, nothing had ever lasted past one drunken stoned night. In fact, it had been a couple months since he'd been with any woman at all, and so his sister's close proximity was inspiring his blood to flow to his loins rather quickly, and unexpectedly!

"Do you, uh, want another drink?"

 

[zydrate]

"Aww, that stinks because you're pretty hot.." she said as she put a hand on his leg and started to lightly stroke his leg, "I mean, seriously Tommy. I would have probably gone out with you."

Mari nodded, "Yeah, another drink sounds good... but, straight up!" She said, before giggling and kicking her legs in the water, making it splash on them both.

 

[StFornicate]

Tommy smirked a bit as his sister rubbed his leg. That was interesting... He laughed as she splashed him a bit, the water getting up in his lap, coating his swimming trunks, and making his stiffening cock quite obvious to any who might look at his crotch!

He stood up quickly, eager to hide his aroused state from his own sister. "Straight up, huh?" he said, and gave her a wink before heading inside with their cups.

He stood in the kitchen for a few minutes, taking his time making their drinks (Mom and Dad would never realize some booze was missing at all!), watching his sister through the window...

 

[zydrate]

When her brother left to get her a drink, Mari laid down on the hard cement way at the edge of the pool. She was looking up at the stars and felt the cool breeze wash over her body.

God, she felt so different tonight..was it because she had graduated and wouldn't have to attend high school anymore. She was growing up.

After a few more minutes of laying there, she didn't realize her hand had snaked down from her stomach to between her legs, which she started to lightly rub.

And fuck, it felt so good...

 

[StFornicate]

Tommy's breath caught in his throat as he observed from afar his own sister starting to masturbate.

The cocktail was working perfectly, wasn't it? He smirked, his cock stiffening again. There was little he could do about it, except pretend it wasn't happening, as he took their refilled cups and headed back out.

"Hey Mari, how about the hot tub?" he called out as he walked out of the house, giving her an opportunity to stop touching herself before he came up on her.

 

[zydrate]

If she had been not feeling so good, Mari would probably have yanked her hand away and been embarrassed. But feeling as she was now, she didn't. Instead, she moved it away slowly and sat up when she heard her brother call out about the hot tub.

"Sure!" She said...well, more slurred as she sat up slowly.

After getting up, Mari walked over to the hot tube, remembered how to turn it on and then got it after the water started to bubble and slush.

When her brother handed her the drink, she took it gratefully and leaned back in the bubbling water.

 

[StFornicate]

Tommy took his time walking up to the hot tub, enjoying the view of his sexy, busty, fit little sister in her too-small bikini. He wondered if her tits ever just fell out of that top.

That would be nice, wouldn't it? She was just slipping into the water as he came up behind her, and handed her the drink before slipping into the water next to her.

"You know, when you get to college, if you ever need someone to act like your boyfriend for a night or something... I'd be more than happy to play the part," he offered with a wink.

 

[zydrate]

Mari rolled her eyes, "So, is this the protective older brother who's going to watch over me?" she said before taking the shot of vodka straight up and downing it.

"What if I did that to you Tommy? What if I pretended to be your girl for a night..what would you do to me if we were...say, at a party?" She asked as she scooted closer to him in the tub.

 

[StFornicate]

"Protective in a way, I guess. Just saying... Sometimes the best way to make someone want you is to appear like you are already taken. The whole jealousy thing..."

He felt her scoot a bit closer to him. It was quite apparent that the drug cocktail was giving her some rather horny thoughts; she was saying the kinds of things siblings really shouldn't say to each other... It was very interesting.

Tommy wondered for a moment if his influence while she was high on the stuff would corrupt his data. He then wondered if he really cared.

"At a party?" he asked, after gulping down his own shot. He was happy he had brought the bottle out with him, but he wasn't in a hurry to refill her glass just yet. He didn't want her wasted, after all. He needed to see how the drug really effected her.

He slipped an arm around behind her, helping her move closer to him. "Well, for starters, I'd probably grab your ass a lot," he said with a chuckle.