The Invention - Cover

The Invention

Copyright© 1999 by Dark Paladin

Chapter 3

Incest Sex Story: Chapter 3 - A young man invents a machine that when women are exposed to it will turn into sex machines.

Caution: This Incest Sex Story contains strong sexual content, including mt/ft   mt/Fa   ft/ft   Consensual   NonConsensual   Mind Control   Incest   Mother   Son   Brother   Sister   MaleDom   Oral Sex  

Sandy realized he was hungry. He walked to the kitchen, trying to decide what to eat. He could still taste Sammy's pussy. He took out a loaf of bread to make himself a sandwich, noticing too late that he was spreading peanut butter on one half and mustard on the other. He threw the mustard half away and nibbled on the peanut butter half. Maybe the device had made him stupid? Quickly he ran through the multiplication tables to twenty, then ran through a few chess openings for six or seven moves. Well, the old memory seemed to work. He wondered Idly if a person could tell if their brain had been fried. Maybe you'd be too stupid to even notice?

He grabbed an apple from the fruit basket and went to his room. He cracked open his textbooks, drilling himself to take the practice tests at the end of the chapters in Chemistry and in math. He was relieved that he got most of the answers right. Brain seemed to work. He applied himself to the weekend's assignments, even reading the American History that he detested so much. He finished the pages in record time. He checked the clock, and decided he'd better go to the school anyway. Sammy should be home by now, he thought. Better than sitting here wondering what his sister was doing. Maybe she'd decided to stay away from him until his folks got home, then confess the whole thing. Or maybe she hated him for taking her virginity. He could just imagine her sitting on the benches crying. Shit, why had he done anything so stupid with his own sister?

The screen door creaked. He took the stairs two at a time, flying down. Sammy was standing in the doorway, carrying her gym bag.

"Are you all right?" he asked.

"I think I am," she replied. "I'm still trying to get over what happened this morning. How are you doing?"

"Oh, I'm fine, I guess," he said. He poked at the ground with his foot.

"Sandy," she said, "I know that I practically raped you earlier. I don't know what came over me, really. Maybe it was that stuff you had, and maybe not, but I think I should apologize. I know I made you do it."

Sandy was astonished. He certainly hadn't expected this reaction. "You... you're not mad at me?"

"No," she said. "I was afraid you'd be really upset with me. I mean, I remember me practically throwing myself at you and ripping off your clothes. Didn't I?"

"Well, sort of," he said. "I mean it wasn't like I didn't help, you know. Oh Sammy, I've been so worried about how you'd be, like whether you'd hate me or something!"

"Not hardly, little brother! I've felt sort of fuzzy all morning, warm and content. And all during practice I kept thinking of you and me, you know, doing it. I wanted to rush home and tell you it was all my fault. But I figured you wouldn't even want to talk to me." Sandy looked at him pleadingly.

"That's dumb," he said. "We've always been able to talk to each other."

"But things are so different now," she said, tears coming to her eyes.

"Well, maybe a little different," he admitted. "But you're still my favorite sister."

"Did you do anything with the stuff?"

"What stuff?"

"You know, I mean that gross smelling perfume of yours?"

Sandy had forgotten all about the vial. "No," he said quickly. "You told me not to do anything with it. How did your practice go?"

"Well, just don't do anything with it. You wouldn't believe how sore I was! Naturally Ms. Fisher wanted us to practice high jumps and splits. She kept asking if I was all right, because I don't usually find them difficult." Sammy smiled a little. "I told her it was an awkward time of month, you know?"

"Anyway," she continued, looking serious. "I want you to promise me that you'll stop your experiments with whatever chemicals you've been using. I think it might be dangerous. Not that enough hasn't happened already! But you've got to promise me. No more fumes in the house. Okay? And keep the stopper in that bottle of yours."

"It's not a bottle, it's a test tube," he protested.

"Whatever. Just keep it bottled up. And a new rule. Our bedrooms are off limits to each other. I think we better just pretend this morning never happened. We are brother and sister, you know. And doing what we did isn't right, even if it was some chemical stuff." Sandy felt relieved. This was the sister he knew well, prudish and bossy. He slouched, relieved. She misinterpreted his action and continued. "Well, you don't have to look so weird at me. Look, we'll just pretend this all never happened. Everything will go back to just like before."

Sandy nodded. Sammy walked to the refrigerator. "Is there anything to eat? I'm absolutely starving hungry. I'd kill for a Hershey's Bar right now!" Instead she pulled out the peanut butter, prying it open. "Oh gross! What's this yellow stuff?"

"Mustard," her brother said. "I sort of got confused this morning. You don't want to know."

"Figures," she laughed. "I think I'll skip the peanut butter sandwiches for awhile." She made a jelly sandwich and turned to him. "Friends?" she asked, holding out her hand.

"Friends," he said, shaking it. But in his mind he was picturing her as she had been earlier this morning.

Sandy didn't get another chance to use the Device the whole week. He asked Cindy Peters whether she'd like to go to the lake with him, just like he'd planned, but she said she had to visit her aunt who was sick. He spent much of the time in classes watching one girl or another, wondering what she'd be like with a few jolts of the Device. Finally Marianne Martin agreed to go to the lake the next Saturday. Marianne wanted to be a biologist, it was her favorite subject. He'd told her that he wanted her to show him where the wild rats lived. She'd wrinkled her nose at the thought of the animals, but couldn't resist the temptation to show off her knowledge.

Marianne Martin was the eighth girl on his list. She was dark, small boned and pretty, with bright brown eyes. But she had almost no figure except for her ass, which all the boys agreed was the finest in the school. Her long dark hair fell straight, nearly to her waist, and she wore skin tight jeans that showed off her firm buttocks quite nicely. Marianne Martin, he decided again, didn't have much, he thought, but her ass made up for it. And her face. Sandy spent Friday night making sure he had his lines straight. No bottle this time. Just a straightforward teenage pass, with the help of the Device. He wondered if she'd let him fuck her from behind, feeling that nice ass right against his front. He imagined himself kneeling behind her, sliding her panties down from her perfect ass, rubbing his cock against it while she begged him to fuck her. His cock got stiffer and stiffer until it almost ached, and he realized he'd better stop before he came just from the fantasy.

But when Saturday morning came his plans were ruined by the weather. It was pouring rain with lightning and winds. The telephone rang. It was Marianne Martin.

"Sandy? Hi, it's Marianne Martin. Have you looked out the window?"

"Yeah," he said sadly. "Cats and dogs."

"They say it's going to go all day long."

"Do you want to come over? I mean, I have these books I got, and we could go over them."

"Uh, maybe. Or you could come over here. My folks are leaving in a few minutes to visit my grandmother, who lives in Forrestville. They'll be gone the whole day. I don't have a ride to get to your place."

Sandy agreed, packing his Device back into the knapsack and wrapping it in a plastic garbage bag. He didn't want water ruining the delicate circuitry. He'd devised a remote control, radio operated, with a trigger he could carry in his palm. The trigger had three tiny buttons, one for single pulse, one for steady cycle and one for a variable cycle he'd worked out with the rats. He tossed in a few library books on rodent behavior and put on his raincoat. He bicycled through the pouring rain, the Device strapped to his back.

In a few minutes he was at Marianne's house. Just as he turned into the driveway a bright flash of lightning flashed before his eyes and he felt the peal of thunder right to his bones. He rang the doorbell, water pouring off his slicker.

Marianne Martin answered it in seconds. She was wearing a fuzzy pink sweater and his favorite tight jeans. Her soft brown hair fell loose to her shoulders in waves which rippled as she laughed at the sight he made. He pulled back his hood and shook like a dog, water flying off his body. She kept chuckling as he shook of the last drops of water. His own jeans were soaking wet from the bicycle ride, all the way to his thighs, and his shoes and socks squished when he walked, little puddles of water forming at his feet.

"Good grief!" she said. "You look like you swam over here!"

"I feel that way too," he laughed.

"Let me hang this in the basement," she said, taking his wet coat. "I don't suppose you brought any dry clothes with you?"

"No," he said, shifting from foot to foot. He watched her turn away, his eyes fixed on her sweet round ass cheeks in the tight jeans. The jeans looked like they'd been sprayed on, and he could see every muscle move as she walked through the hall to the kitchen. His cock began to get hard just watching her walk.

"You just stay there a minute," she said. "I'll be right back. My Mom would kill us if we got water on her carpets."

Sandy slipped the activator for the Device from his shirt pocket. At least it was still dry. "Wait a sec," he called after her. "Maybe you could take these, too? If you don't mind bare feet, that is." She grinned, shaking her head. He unlaced his sneakers and pulled off his socks. His feet were soaking wet. He held them out and she came back to take them. He pulsed the Device just as her hand touched the wet shoes.

"Oh!" she exclaimed, shivering a little. "I think you brought the cold air in with you, too!" "It's not that cold out," he said. "Maybe it's evaporation, or something."

Marianne nodded and walked back into the hall, disappearing through the kitchen door. His eyes were still fixed on her fine tight ass, imagining what it would look like without the jeans. She came back with a towel, tossing it to him. He dried his legs and feet and he followed close behind her into the kitchen. The lightning storm was intensifying, and the lights flickered. Taking advantage of the distraction, Sandy pulsed his Device again as he dropped it into his shirt pocket. Marianne stopped suddenly. Sandy collided with her, his arms encircling her waist. His stiff cock touched her rear through their pants and a thrill of excitement ran through him.

"Ooops, sorry!" he said, starting to step back.

"Oh, I didn't mind," she said. "Actually, I'm scared of thunder. I guess that sounds kind of foolish, but I've always been. I like being held. Especially by someone I like. Oh Lord, I'm being awfully forward, aren't I? And I don't even know you that well, Sandy."

"I guess I didn't mind, either," he replied. "Maybe we'll get to know each other better today."

She turned to look at him, her soft eyes half lowered. "Hmmm, well, maybe. Come on, let's get looking at those books."

Sandy put his knapsack on the kitchen table between them as they sat down. He pulled out the first book. "Doesn't it bother you, working with rats?"

"You mean because I'm a girl? Oh no. I like them, at least the small white ones. The gross gray rats that live in cities, well, I haven't decided about them yet. They're called Norwegian Rats, you know."

"What's the relationship," he asked. She opened the book to find the family tree of rodents. While her head was lowered he fingered the activator through his shirt pocket and turned on the automatic sequence. Her fingers curled around the pages.

"Uh, I'll show you. It's in here somewhere."

He could see her struggling to pay attention to the text, her finger running down the table of contents. But she pressed her arms together, squeezing her small tits between her forearms and sort of shook her body. He could see a red flush begin to develop on her neck.

"Uh, Sandy," she said, hesitating, her breathing getting faster. She looked a little confused, as if trying to get her thoughts straight. "Are you sure you're okay in those wet pants? I mean, I don't want you to get a chill."

"Actually, they're pretty uncomfortable. Why?"

"Maybe we could find you something else, like something of my Dad's, you know? Get you warmer, or something. Do you want me to go look?" Marianne stood up. There was another flash of lightning. Sandy put his arms around her waist.

"This would make me warmer," he said, pulling her close to him. He stood up and kissed her full on the lips and she kissed him back, closing her eyes. He could feel her body tremble as the Device ran through its preprogrammed sequence. She pressed her groin against his, her hips starting an involuntary thrusting motion as his tongue touched her lips. He could feel her small firm breasts pressing against his chest and her thighs wrapping around his leg. He lowered his hands on her back, finally getting them on her perfect buttocks. They were as firm and tight as he had imagined.

"You've got something in your pocket," she said, pulling away slightly.

"Maybe I'm carrying a gun," he joked.

"No, not THAT pocket," she laughed. "Although I think you might have something there, too. Your shirt pocket."

"Oh, this," he said nonchalantly, pulling out the activator and dropping it on the table. "It's a control for a stereo I've been building. I forgot I had it there."

"It was poking me," she murmured, nuzzling up to him again. "Now where were we?"

"You were going to get me out of these wet pants," he said, kissing her again.

"Was I?" she said, almost to herself. "I suppose we should. Come on."

He released her and followed her back into the hallway. "Do you mind coming upstairs?"

"No, that's fine."

"Come on, then."

He grabbed his knapsack and the control. "Should I take the books?"

"Oh, right, the books. Whatever."

At the top of the stairs she turned to him. "That's my Dad's room," she said, pointing. "And that's mine. You can change in mine."

Sandy went into her bedroom. Stuffed animals lined the walls, on top of bookcases full of magazines and novels. Marianne came in carrying a pair of pants.

"These may be too big," she said, holding them up. Her father was a portly man, and Sandy figured that two or three of him could fit in the slacks. "But let's try."

She placed the pants on the bed and walked over to him. He undid his belt buckle and sat down on the bed, again starting the Device. He began to strip off his pants, aware that she was watching every move. When they were off he dropped the wet jeans on the floor, standing in front of her in his underwear, his cock stiffly pushing out against the white cotton.

"I bet both of us could fit in those," he said, pointing to the brown pants.

"Ummm, yes. Probably. Hold me again," she said, coming right up to him. Sandy felt his cock brush against her leg as he wrapped his arms around her again, this time slipping his hands under the pink fuzzy sweater. Her skin was smooth and warm to his touch. Marianne pressed herself against him again and he lifted the sweater, pulling it over her head as she began to unbutton his shirt. He put his arms around her again, this time working open the clasp to her small white bra. She rubbed her body against his as his hands returned to her ass.

"Let's get these off too," he said, unsnapping the front of her jeans. She didn't resist as he pulled them down over her hips, sitting on the bed with her legs out so he could remove them completely while she took off the brassiere. Her tits were small, like he expected, but nicely shaped, little cones of flesh with large brown areola. Her nipples were erect, just like his sister's had been, nubbins of pink that she rubbed against him. He moved his hands up her legs, lightly passing them over her knees up to her hips. He pulled her to her feet.

"Do you know," he said, "that you have a beautiful body. And the most perfectly shaped ass anyone has ever seen?"

Marianne giggled. "Actually, Sandy, I've heard some of the boys in school say that. But nobody at school has ever seen it."

"We should fix that."

"Do you want to? Would you like to?"

"Sure," he said. Marianne pushed him onto the bed then turned her back to him. She very slowly began lowering her panties, pushing them down little by little. He could see the furrow of her buttocks, then the smooth line where her tan ended, then the skin of her ass cheeks, and finally the full ass. She bent over, exposing her ass to him, pushing her panties to her feet. He fixed the sight in his memory as she stood before him, trembling slightly. Marianne was really a gorgeous girl, and a perfect piece of ass! Her waist was narrow and her bottom really was heart-shaped. She looked over her shoulder, smiling at him, then turned around. Between her legs was a dark triangle of curly hair covering her pussy.

"Well?" she asked.

"Even better than perfect," he replied. He put his hands on her hips, then slowly ran one finger down her stomach to her pubic hair, tracing down the slit of her pussy. She spread her legs slightly and her trembling increased as he continued between them, feeling her well lubricated cunt.

"You're pretty wet down here," he commented.

"What about you? Do we have all the wet clothes off?"

"These might have got rained on, too," he replied, standing and pointing to his jocky shorts.

"Well then, we better get them off," she said. She put her hands inside the elastic and lowered them, gasping when his cock popped out. "It's perfect, too," she said.

Sandy stepped toward her, taking her back in his arms and kissing her while she rubbed her body against his again. She turned her face upward for another kiss, and this time he felt her soft tongue enter his mouth. She raised her leg and his cock slid under her pussy, lightly pressing upward into her slit. Marianne groaned softly with excitement and he could feel her moisture on his shaft. She pushed her hips back and forth, rubbing his cock against her well furred slit.

"Turn around," Sandy said. He'd picked her because of her perfect ass, and that's how he wanted to take her, from behind. Marianne looked puzzled, but turned to face the bed. He put his arms around her, fondling her tits as his cock slid between her smooth ass cheeks. He felt it press against her asshole and stopped, feeling her stiffen. He squeezed her nipples in his fingers. His throbbing cock rested at her asshole a minute, the head pressing lightly into her rear passage, but she lifted her body and his cock slid right between her legs until it was sliding back into her wet cunt.

"Oh yes! Sandy! Take me!!"

Marianne groaned with pleasure, turning her head to kiss him. He took her tongue back into his mouth, sucking on it as he lowered his knees, getting a better angle for penetrating her sweet snatch. He lifted the knapsack as if to move it out of the way, actually turning the Device back on. As they kissed deeply he pushed steadily upward, feeling her cunt. He kept pushing until he felt her pussy lips separate, accepting his organ. She pushed back and he felt his cock slide right into her pussy little by little. She was looser than his sister, he realized. Maybe she wasn't a virgin?

"I don't want to hurt you," he started.

"Oh, don't stop!" she moaned, pushing down against him to slide more of him into her. "Just don't stop! You you're not the first. Last summer one of my cousin's and I did it."

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