Sex emergency during a family Christmas gathering! Based on a post by HeyAll. Listen to the Podcast at Steamy Stories. No one at the university’s research facility could have predicted that Dr. Ledgard’s machine would have the effects that it does. The human mind is still vastly unknown. While studying new treatments for bipolar mania, some partial successes did recreate some symptoms of certain mania behavior; hyper-sexuality, to be specific. It was a national security contractor who first suggested that this subtle wave frequency could help the CIA and other security agencies. That’s why General Hamilton requested an immediate promotion for the doctor, in hopes of turning the frequency machine into something that could potentially serve the country and its national security (& espionage) interests. On the doctor’s desk was a list of potential candidates for the new test project. They were all young adults, medical school graduates who understood the process and were interested in making some money. It was decided that the next candidate would need to be an attractive young female with an inquisitive mind, traditionally religious, tepid when it comes to sex, and had a large enough family. It would make the experiment more realistic if the subject had conflicts and barriers to becoming a nymphomaniac. “You’re doing us a great service,” General Hamilton said, after observing the research doctor at work. “We greatly appreciate your efforts.” Dr. Ledgard gave a soft sigh. “I’m always happy to be of service, but I think we should disclose all of the details. I don’t want a repeat of my previous mistakes.” “Just get it done.” With a lecherous grin, the General gave another look at the research documents and state-of-the-art equipment in the new lab. Then he left. Once alone, Dr. Ledgard looked through the pile of candidates again. After an hour, a decision had been reached and the report was started. Deviance Case File  0 0 2 Sara Carter: She is our next test subject, after having signed the agreements and waivers. Sara is a 29 year old medical school graduate who is currently finishing her first year of residency. Her record is clean. Her grades are top tier. No evidence of sexual promiscuity. In her younger days, she spent a lot of time with her church, for community service. Dylan Carter: He’s the younger brother. Age 21. He attends a nearby college. He’s athletic and smart. Handsome. An ideal counterpart for Sara. Julie Carter: The matriarch of the family. 51 years old. She owns a small catering business that her late husband built. Her son still lives at their family home and Sara sleeps over during the holidays. There’s been no husband/father in the picture since the cancer death of Julie’s 2nd husband, so she runs the household. From the looks of things, the mother is prim and proper. A great classic role model. She remarried when Sara was 10 years old. Julie’s first husband was a Navy pilot who died in an accident while testing a new jet. Julie then married a widower, whose first wife died in childbirth, when Dylan was born. Objective: To convert the primary test subject into a nymphomaniac. Originally, it was irrelevant whether the subject was aware or not. But now, for ethical reasons, she will be notified of the extreme consequences. When the message came from Dr. Ledgard’s office that she had been selected as a participant in the study, she jumped at the chance. Sara rushed home to tell her Mother the good news, who was busy in the kitchen wearing an apron. “Hi sweetie, don’t forget we’re caroling at the nursing home tonight, with the rest of the church choir. So, how did it go with your interview?” Mom asked, stepping out of the kitchen where she was baking homemade pizza for a family lunch. Sara beamed. “It was incredible. The lab looked like something out of a movie. Seriously. I’ve never seen anything like it before. And everyone on the research team was super nice.” “I’m so happy for you. Who knows, if they like you, maybe they’ll hire you someday.” “God, I wish,” Sara said gushingly. “Speaking of which, having you back for the holidays has had a nice effect on your brother.” “Oh yeah?” Sara  was curious about what mom meant. “He’s decided to take pre-med classes. You’ve inspired him to do some good in the world.” “Nice!” Sara celebrated. “It is. He’s a smart one, just like you.” Mom beamed with pride. Sara pondered for a moment. “You know, one of the researchers today asked me about my household. They wanted to know about my brother and home situation.” “Any reason why?” Julie seemed incredulous. “They said they’ll tell me later. It may have to do with a research project I applied for. It pays pretty good money, and right now I could use some extra cash. But it was mentioned that if Dylan wanted to be involved, then he’d be welcomed. They’ll give him a small job to make things easier. I didn’t think Dylan would be interested. If I had known, I would have said something.” Mom smiled, “He’s upstairs. You should go tell him.” “I’ll be right back.” Sara’s voice trailed off as she trotted up the stairs. Sara went up to break the good news to her brother, whose room was at the end of the hall, and she knocked on the door. With approval, Sara entered the bedroom, where her brother was playing on the Xbox. “I hear you’re setting your sights on pre-med?” Sara began. “Is that what Mom told you?” he asked. “Yeah, why? Did she speak too soon?” Sara asked? “I don’t know. I’m prepared to work hard. But it’s intimidating, to be honest.” “Here, I’ll describe one morning of my residency,” she said. “So you can get an idea of what I do.” “Sure.” “I get to the hospital early, and I check on each patient’s charts, making sure their blood pressure and oxygen saturation levels are measured, then I explain all the diagnostic procedures and therapeutic plans to both supervisors and patients. It’s like that the whole day.” “Sounds tough,” he said. “But I’ve always done well in biology and science.” “Do you want to test yourself?” Sara challenged him. “How?” Dylan asked, hitting the pause on his video game. “With a mock-female-patient to practice on. You’ll be given small tasks. Some responsibilities. Recording information, that sort of thing. Plus she’s hot.” “Really? How hot is she?” Sara winked. “You’re looking at her.” “Hmm. I’m assuming this has to do with Dr. Ledgard’s experiment.” Dylan revealed his insights. “Yeah, they mentioned a small job opening. Now that I know you’re interested, we should definitely team up.” Sara offered. He smiled, “Count me in. I’m now at your service.” The lab was in a small section of an underground facility, not far from the downtown medical campus area. It was accessed through an imposing government building guarded by soldiers  who were all-business when Sara arrived at the gate. They asked for her papers when she pulled her car to the checkpoint and, after consulting a computer in the guard shack, returned them to her and waved her through. When she parked & headed into the building, a few members of the team greeted her with smiles and showed her to the procedure room. She was asked to sit on the exam table and her vital signs were taken by a woman in green scrubs. In the other corner of the procedure room, another woman calibrated a small machine for the day’s session. Dr. Ledgard appeared after a meeting with government officials and sat down across the table from Sara. They exchanged pleasantries, then Dr. Ledgard handed her a file. “Take a moment to read that over,” the doctor said. “I wrote it myself. Everything is simple and in plain English.” Sara opened the folder and saw a typed report, which she was able to skim through. The content seemed jarring. When she turned the pages, she saw sets of pictures, featuring a young man and a mature woman engaging in all sorts of lewd sexual acts in a living room and kitchen setting. “What do you think?” Dr. Ledgard asked. “Riveting,” she blushed. “Do you believe the content of the report?” Sara searched for the most polite way to phrase her language. After all, in med school, Dr. Ledgard was the talk of campus and many of the professors. “I think it’s interesting,” she said. “I’m sure there are ways of actually making this happen, psychologically speaking.” Dr. Ledgard raised an eyebrow. “But do you think that these images are real, and that a medical device could override the inherent taboo objections, causing this ordinary mother to act in this manner towards her own son?” “Yes, it seems logical that a device could do that,” she answered. “But I also think that, you know, there might have been underlying feelings. Who knows, maybe the device merely nudged them to act on latent desires. Or maybe the device never worked at all, but the subjects thought it did. Sort of like a placebo effect that caused them to act on their desires.” “Interesting,” the doctor noted before pushing on. “Ms. Carter, I’m going to be blunt with you. Have you ever fantasized about your younger brother, Dylan?” Sara was aghast. “No, never.” “How about your mother, Julie? Have you ever had deviant thoughts about her?” “No, absolutely not.” Sara blurted, with a nervous chuckle. “Do you believe that this machine can create a powerful, magnetic sexual attraction between you and a member of your family? Much like the mom/son in the photos.” With an inquisitive eye, she sifted through the photos again. The people in the photos had what appears to be passionate sex, had equally as rough oral sex, and if Sara was seeing things correctly, the male subject was ejaculating in the mother’s food, then she happily ate. “Honestly,” she said. “I’m not completely sure. I still think there was possibly mutual attraction before the experiment. But I doubt it happened out of thin air.” “I appreciate your honesty. And I enjoy your skepticism. You’re a smart and independent thinker. That’s partially why I’ve chosen you.” She blushed. “Thank you, Dr. Ledgard.” “Are you still interested in participating in the study? And what does your schedule look like for the next week or two? "Yes, of course I’m interested. And my family has a big holiday gathering in a few days, other than that, I’m just doing my residency routine and spending time with my immediate family?” “I am going to amplify the power of the frequency today,” the doctor said. “Okay.” “Then we’ll see what sorts of attractions you have for your brother, or your mother.” Sara gasped. “I’m certainly not attracted to either of them. That’s basically incest. It’s gross.” “I’m glad you feel that way. We need to test the machine to know whether the previous experiment was a fluke or not.” “What, umm; are the chances?” she asked. “That I’ll,.” “Become a nymphomaniac?” Mr. Ledgard finished her nervous concerns. Sara felt her cheeks warm. “Yes.” “That’s what we’re hoping to find out. After a week or two, we’d like to administer a polygraph test to see if you’ve committed sexual acts with any member of your home.” “Oh god.” Sara gasped at the notions. “I understand your frustration,” Dr. Ledgard said. “Which is why we’re going to increase your compensation. You’ll be rewarded even further, financially speaking. I’ll provide glowing job referrals for you. And I will personally recommend you for any internship or job opening in this department, should you wish.” It was the news Sara had been hoping for. Her future flashed before her eyes. If everything went well, she’d have a bright career ahead of her. “That sounds amazing,” she said. “It does. Who knows, the side effects might be nothing. The other experiment could have been a fluke. If you do exhibit nymphomaniac tendencies with your family, we can fix it in our lab. That should provide you with some sense of safety.” “So if anything goes wrong, assuming this machine does what you’re suggesting, then I can come right back and have it undone, right?” Dr. Ledgard paused. “It would be addressed.” A slight sense of panic was setting into Sara’s psyche. If this machine had worked the way the doctor suggested, then she could be in for a real problem. Sara never doubted her own resolve on moral conduct. But then again, it did sound outlandish and crazy, and the reward for participating was fantastic. “I can do that,” she said. “You’ve also mentioned that your brother Dylan wants a job with us, for experience. I think that’s a great idea. He’ll be tasked with keeping track of your vitals, for brain waves and heart activity. He’ll send us a daily report on the findings. Since you’ll be home for the holidays with him and your mother, all of the daily monitoring can be done without leaving the house.” She smiled, ”He’s going to be thrilled.“ "Then we’ll begin right away.” Dr. Ledgard said with eager resolve. With the questioning over, Dr. Ledgard stepped away from the desk and the researchers hooked wires to Sara’s face and body. A small, advanced looking device was carted over to them, and a small antenna was pointed straight toward her head. The exam room’s cameras were confirmed to be recording the procedures. “Initiation in 5, 4, 3, 2, 1,” Dr. Ledgard counted. “The subject Sara Carter exposed to the device emissions on December 20, at 10:23 a.m.” The machine was activated. When it made a low, humming noise, Sara wondered if she had just made the biggest mistake of her life. An hour later, Dylan met with Dr. Ledgard’s staff and accepted a research contract. He was trained on the equipment and the reporting format. Then left to meet his sister at home. At home that afternoon; Sara sat by the desk in Dylan’s bedroom and her brother recorded all the latest updates. The device was small and could attach wired pads to her body, keeping track of her vital signs and brain functions throughout the day. Dylan was completing his second status check. This family arrangement was perfect. It not only provided convenient clinical monitoring at home, but also provided the strategic opportunity for a brother & sister to interact in a private setting. “Everything seems fine,” Dylan said, jotting the numbers down in a notepad. “You’re quite the researcher now,” she smiled. He smiled back. “This is easy stuff. And there’s one thing I thought was interesting. I’ve been meaning to ask you about it.” “Yes?” Sara looked at her brother. “Your heart rate and hormones seem to change at random points. At first I assumed it was your workouts, but when I looked closer, that didn’t seem to be the case. Feel anything weird?” After a moment to think, Sara realized the device recorded her recent flairs of intense sexual thoughts. But of course, she could never tell her brother that. “Well, you know,” she said. "Women work differently than men. We have different problems and issues, if you know what I’m hinting at.” The ambiguous excuse seemed to have worked. Dylan backed off. “Oh, okay. Got it.” “I should have given you some notice about that, but it was kind of embarrassing and I didn’t think it would show up on the device.” “It’s advanced,” Dylan pointed out. “Now let’s get this thing back on you. Lift up your shirt a little.” These moments were always a roll of the dice. Sara never knew what to expect with her own feelings whenever she lifted her t-shirt. Sometimes it would be fine, since Dylan had seen her in a bikini before. Other times, there’d be internal chaos. When she lifted her t-shirt to expose her stomach and the lower side of her bra, things went haywire. She suppressed the feelings the best she could and tried to act natural, even though her heart rate was spiking. Sara’s thoughts went into a frenzy; ‘God, he’s looking at my body. I wonder if he wants to rip off my bra and suck my nipples. My cunt is getting wet. I wonder if he can smell my aromas.’ Everything seemed normal on Dylan’s end, as he strapped the device to her side and taped the wired pads to her body. She looked at him attentively, staring deeply at him while he worked. Had he noticed? He lifted his gaze, looking at her. “Yes?” “Nothing,” she said, quickly looking away. When the pads touched her body, and Dylan’s fingers grazed her skin, Sara felt like she could have had an orgasm right then and there! 'God, why did I have to wear a bra?’ a thought popped into her mind. 'I want him to see how hard my nipples are. I want him to suck on them. I could cum so fucking hard right now.’ She glanced at her brother again, who was doing his job. Her cunt felt swollen, just like her nipples. She needed; something, anything from him. In a few more seconds, she’d have enough courage to yank her bra and say, 'Just fucking suck on my tits already. Then bend me over your desk and fuck me from behind!’ It was about to happen, but sadly for her, Dylan pulled her T-shirt down. “All done,” he said. “You’re free to leave my office. The next appointment is tonight at 8 pm. Don’t be late.” She played it cool. “Five stars on Yelp. Plus a good review. See you tonight.” When she got up and left Dylan’s bedroom, she wondered how she could survive the rest of the week. How she prayed Dr. Ledgard could reverse this. At the moment, there was only one other person she could confide in. Mom was in the living room preparing for the big holiday party tomorrow. She was in the middle of arranging the furniture and had already finished with the decorations. “Lovely, isn’t it?” Mom said, referring to the festive décor. Sara looked everything over. “It’s amazing. I’m excited for tomorrow.” “You should be. I received some fantastic news a moment ago. Some of your distant Aunts and Uncles had extra time freed up and they’ll be catching last minute flights.” “Oh really?” Sara smiled. “Yes, really. It’ll be a large family affair. Our home will be stuffed.” There were family pictures on the wall, which reminded Sara of how many people are coming for the big holiday party. With her current medical state, she was in even worse trouble, because she would have to spend the whole day entertaining guests, instead of tending to her urges. “I’m screwed,” Sara bemoaned, wanting to cry. “Are the feelings back again?” Julie looked concerned. “It’s only gotten worse.” Sara nearly sobbed. “I’ve had those thoughts again.” “Sweetie, I think you should end it. You’re a nervous mess.” “But I’ve already told so many people that I’m working with Dr. Ledgard. It would be humiliating if I had to back out.” “Nonsense!” Mom snapped. “Everyone knows you’re not a quitter. You’re smart and talented.” “My reputation would be ruined.” Not only that, Sara had to think about her brother. She needed to be a role model. If she quit this experiment, what kind of message would that send? Big sisters have a solemn duty to their younger brothers, she thought. “Give me a hug,” Mom said. They embraced in a tight hug. It was loving and sweet, something they often shared whenever Sara was experiencing heartache. She pressed her face into Mom’s upper chest for comfort. Sara had always been a self-disciplined and responsible person. Only her mother knew of the times Sara felt weak or insecure. Under normal circumstances, this hug is where things would end. They hug, and Sara would leave feeling better. But this was far from normal. Those deviant little thoughts had returned. Sara’s mind felt like it was spinning: 'Mom’s breasts feel so nice. So soft; so delicate; and they’re just for me.’ Without thinking, her hands clenched her Mother’s lower back, with her fingers digging in. It felt like a natural thing to do. The most natural thing in the world. “Sara?” Mom asked. “Yes?” “Your hands are squeezing me.” Sara gasped and released her iron grip. “I’m sorry.” “How bad is it?” “Pretty bad. I mean, just a moment ago, I kept thinking about how aroused I’d be if Dylan saw my hard nipples. I kept thinking of it, over and over again.” “And now?” Sara gave a soft sigh. “You don’t want to know.” “Tell me.” “I thought about your breasts, from our hug. Horrible, right?” “Did you want to see them?” Mom asked. “Touch them?” Sara’s jaw nearly dropped. “Oh, jeez.” “Don’t give me that expression. You’re the one with the naughty thoughts in your mind. I’m only asking. Maybe there’s something we can do.” Sara gulped. “I wanted to,  suck on them. Oh god, I’m so sorry.” “A mother’s breasts are made for nurturing. They used to feed you. Nature’s perfect gift. If you’re suffering this badly, then I would be fine helping you.” “What do you mean?” Sara asked. “Maybe you need to get this out of your system. Spare yourself. And spare your brother. It’s much easier this way.” Mom took a step back, then undid her top to reveal a white bra. The breasts looked large and inviting, begging to be touched. Sara gulped. “Promise you won’t be mad?” “Darling, this is a medical emergency. It’s nothing to be ashamed of. These aren’t your normal thoughts. This isn’t you. Obviously, we can’t allow these medical episodes to happen during the family party, or ever. So the only thing I can do, as your mother, is help relieve this tension until Dr. Ledgard can correct the problem. Okay?” “Mom?” Sara said with a shock. “Shush, Just have a look first. Let me show you.” It was a surreal moment between them when Mom reached behind and released the fasteners of her bra. When the garment slid off her shoulders, Mom’s spectacular breasts were freed for Sara’s view. They were large, shapely globes the size of grapefruits. Age had been kind to Mom, as Sara devoured those breasts with her eyes. She noticed that the nipples were becoming larger and more erect; the areolas the size of silver dollars and an inviting pink color. Sara gulped. “Can I suck on them?” “Of course you can.” Julie beamed with maternal pride. “Will you be mad?” Sara struggled with her inner taboo standards. “Never.” Julie assured her beloved daughter. A dirty thought appeared in Sara’s mind: 'How fucking delicious. I have the best Mother in the world. First Mom, then my brother. The perfect holiday for me. No one stands a chance.’ She brought her lips to Mom’s left nipple and sucked. Fireworks went off in Sara’s mind when her lips made contact. She wrapped her lips tight and pulled with her mouth. She sucked so hard that Mom made a gasping sound. “No one can ever know,” Mom said, rubbing her daughter’s beautiful hair. “Get it out of your system. Enjoy this. I need you at your best tomorrow.” As Sara nursed on her Mother’s tits, she wasn’t sure if that was possible. But this was a welcomed start. Her Mother’s hands moved around, and as Sara nursed on the hard nipples, she felt her Mother reaching forward to rub her tits in return. Could it be? Was Mom enjoying this too?The Party Despite her worries, Sara did her normal hostess duties as the party guests would expect. There was a last minute option to leave home while the party happened, but that was out of character for her. There was no way she’d ever let her family down. She loved everyone too much to hide because of a medical issue. Especially since she’d been away from everyone during her first year medical residency. The party was the same as always. Uncles, Aunts, and cousins from all over had come to visit. Mom did most of the schmoozing. Dylan was in charge of food. Sara was tasked with service, which she enjoyed doing with her beautiful smile and charm. Wearing a cute yellow dress, Sara went around the living room to make sure everyone was having a good time and was properly fed. Through it all, she had a chance to catch up with distant relatives and people she only saw a few times a year. The Aunts and Uncles showered her with the usual compliments: 'You’ve become so beautiful!’ 'You remind me so much of your mother when she was your age. “A doctor? Brains and beauty. A dangerous combination.’ But for all the fun, Sara’s demeanor made a drastic change when her brother stepped into the living room. Though he was just coming to socialize with family, it felt different. Sara had always been the 'good girl’ at the family functions, but as Dylan chatted and laughed, Sara’s thoughts were far from good. Crazy thoughts ran through her head: 'Take him upstairs and fuck him. Yes, even with the family party going on. Nothing will make me hotter.’ She realized the thoughts were making her cunt wet as they repeated in her mind, growing more insistent with each repetition. "Are you okay?” Mom whispered in Sara’s ear. Sara snapped out of her trance, and she turned her attention towards her Mother, who was dolled-up like the perfect Milf. “It’s happening,” Sara whispered. “I’m really sorry.” The only reason Sara apologized was because a few hours ago, they had engaged in another nursing session. It happened in Mom’s bedroom while Dylan was in the shower. Mom had exposed both of her luscious tits and allowed Sara to suck on them for a good 10 minutes straight. Mom’s nipples even turned red. “It’s not your fault,” Mom replied. “What are you feeling?” They both looked around. The coast was clear and the living room was loud with chatter and laughter. “I want to take Dylan upstairs to fuck him.” Mom sighed. “Will a cold shower fix it?” “Unlikely. God, I’ve never been so desperate in my entire life.” “Maybe you should handle it already,” Mom said after a long pause. “Huh?” Sara stared at the mother who instilled strong and clear moral standards in her. “I remember what it’s like being your age. Hormones are raging. Things are confusing. I’ve tried my best to help, but nothing is good enough.” “Are you suggesting that I fuck my brother?” Sara asked. “I’m not saying that either. And he’s your stepbrother. I adopted him at the same time your dad adopted you, shortly after our wedding.” “Then what are you saying?” Mom looked around. “Sex is an indulgence, much like food. If I have a slice of delectable chocolate cake, my cravings are satisfied and I’ll stop thinking about it for a while. Does that make sense?” “It kind of does.” Sara wanted to convince herself. Sara thought about her brother: 'Mom is a genius. I want that cock so badly. I want to fuck him while the party is happening. Everyone would be oblivious to the fact that I’m an undercover brother-fucker.’ “It’s a guilty pleasure,” Mom said. “I’ll never fully condone it. But, and this is very important, you know that I have a reputation to uphold. Things have to run smoothly at my parties. The family depends on me.” “Everyone looks content right now.” “At the moment. If you and Dylan disappear for 15 minutes, then I would be okay with that. But I’d need you back immediately. Dylan too. Please be gentle with him.” Sara’s eyes widened. “Oh my god, Mom.” “Don’t give me that. Besides, isn’t this part of Dylan’s job?” Julie added.Step-Sibling Indulgences After dragging her brother up the stairs, she was in complete control of the situation. She decided that Dylan’s room would be the best place. She wanted to fuck on his desk. Just like in her naughty fantasies. “Mind telling me what’s going on?” he asked. Sara locked the door. “It’s time for me to be honest. I need to fuck.” “What?” “I’ll give you the details later,” Sara told him. “The short version is that Dr. Ledgard’s experiment messed me up. Badly. I knew it was possible, I just didn’t believe it.” “Believe what?” She lifted the front of her dress. “This.” With her dress held up with one hand, she used her other hand to pull her panties aside to reveal her cunt. It was cleanly shaven and the clitoris was swollen while protruding from her labia. Sara dipped her index finger into her entrance. She held her finger out, showing her brother a thick and clear liquid consistency. “Holy shit,” he gasped. “Is that the source of those weird signals coming from your body?” “Yes, I haven’t been right for the past two days. My cunt is killing me.” So, umm; why are you showing me?“ "I’ll explain the whole thing later,” she sighed. “But right now, I need you to bend me over the desk. Fuck me, like our lives depend on it.” “What the,” Dylan blurted. “Dylan, look here,” she said, rubbing her labia. “ It’s an emergency. I want you in me, I need you in me!” “But, why me?” Dylan asked, worried about the potential implications of doing something so taboo. Sara swallowed her pride. “I need your cock; yours specifically. I’ve been thinking about you like crazy. It’s freaking me out.” “You mean, because of the experiment, you’ve,” Dylan was trying to process this bizarre reality. “Are you interested or not?” she said firmly. “I, umm; sure. How should we start?” Sara brisked over to him, grabbed him by the belt, and pulled him to the desk. She yanked his pants down and his semi-erect penis was almost ready to go. The horny little bastard was quickly aroused by the sight of her wet cunt, she thought. At least she was under a spell; Dylan had no excuse. “We’ve got to be quick,” she said, stroking her brother’s cock. “Mom needs us back as soon as possible.” “Does she know?” Dylan was now even more confused. She could see the conflicting emotions play across his face, lust winning out, as she continued stroking. Her inner voice told her; 'Go ahead. Tell him everything. My younger brother needs to know. It’s about time he knows what I really am.’ “I’ve told Mom everything,” Sara confessed in a low purr. “Mom knows more than you do, about the research. I confide in her about everything in my life. Mom knows how badly I want to fuck you. The truth is, Dr. Ledgard’s research has already accidentally made a mother and son have sex. I didn’t believe it. Now I’m the next step in the research.” She continued,”Mom tried helping me. She thought she could alleviate these nymphomaniac tendencies by showing me her amazing set of tits. She let me suck on them. That’s right, I nursed on Mom’s tits and pulled her nipples with my mouth. I think she likes it, since she fondled my breasts as well.” He was dumbfounded with arousal. “You and Mom? Nymphomaniac?” “I know, shocking. I can explain more later, but right now I need to get fucked.” Sara was under the influence of the frequency waves and she couldn’t care less that the whole family was downstairs, having a nice, wholesome time together. Actually, the risky act was turning her on even more. These were the nymphomaniac tendencies she had been warned about, and now she was loving every second of it. To get him fully erect, she grabbed his neck and pulled him in, planting a big kiss on his lips, then into his mouth. It was gentle at first, before turning rough and slipping her tongue inside. Their tongues wrestled for a good minute. All the while, she could feel her younger brother throbbing in her hand. She pulled back and released him. “You’re ready.” Sara pulled her yellow party dress over her head and unsnapped her bra. It was amusing seeing Dylan so speechless, cock freed, and in admiration of her attractive body, knowing they were about to fuck. She had always been the leader in their sibling relationship, now it was heading in a new direction. Sara bent over her brother’s desk, presenting her rounded ass. That way, her little brother could fuck her easily while standing. Her juices were running down her long, shapely legs. Her cunt lips were swollen and inviting, begging to be filled with his achingly hard cock. “Your ass is amazing,” Dylan said, sticking his index finger into her vagina. “Just fuck me already, please.” Sara was over the edge and didn’t care that it’s wrong by society’s standards, by her moral standard. All she wanted was to be fucked by her brother. Sure, it was nice sucking on Mom’s tits, but that did little to satisfy the intense craving between her legs. Only her brother could do that, with his thick rigid penis. She felt her cunt being spread wide, while she opened her legs for him. Inch by inch, her wet cunt was being entered. Despite her tight virgin cunt, it was an easy process because of how fucking aroused she was. “Oh yes!” Sara moaned, before realizing that she needed to keep her voice down. Her hymen split and  the tingling pain just added to her arousal. Dylan pumped faster, with an unrivaled force. “Your cunt is amazing. Fuck. I can’t believe I’ve been missing out on this.” “Just keep it quiet,” she hissed. While she was being pounded from behind, her submission to her brother was now complete, with her cunt being ravished. Her brother teased her by pulling her hips and bombarding her with his thrusts, slamming his balls against her cunt lips and gliding his cock through the warm folds of her cunt walls with incredible speed. He reached up and pinched the nipples of her dangling tits. It was everything she needed. Even though Sara was lost in what her brother was doing, and doing so well, she heard noises in the hall. She knew the bedroom door was locked, but they still shouldn’t be heard. “Stop, Dylan, there’s someone in the hall,” she whispered. Dylan stopped for a second. “They’re in Mom’s room. I’ll go slow.” Sara didn’t have the willpower to stop her brother; instead she buried her face in the pile of papers they used to record her data and she pushed her hips, to encourage the fucking to continue. Dylan’s cock was gliding through her canal, slowly retreating back, leaving only the head at her entrance, then going all the way in again, filling her insides. Her inner voice re-appeared; 'Finally, I’m a happy girl. All I need is his cum. His cum inside me. Then I can reach between my legs. Scoop it. And slurp it all down.’ The thought of Dylan’s cum pumping into her eager cunt had Sara licking her lips. Her body demanded more from her brother. Her body needed to be filled with his seed, to have his cum leak between her vaginal walls and stream down her legs. After a few minutes of slow, sensuous fucking, the incestuous couple heard footsteps heading down the stairs. Without a word, they sped up their lustful attack on each other and Dylan was again plowing into her with wild abandon. “They’re gone,” Dylan said, pumping harder. “You like it harder, don’t you?” “Yes, yes, yes!” she cried. He groaned,”Where can I cum?“ "In my cunt,” she said. “I want to eat it right after.” “Really? Oh, fuck!” That sent Dylan over the edge as he pounded with all his might, making Sara cry. Sara’s tears increased as she approached her earth-shattering climax at the same time as her brother. They both came and she felt her cunt flooded with her brother’s load. She could feel their cum mixing and intertwining to form a cum cocktail during the family party, which would be her secret treat. She reached behind her and pulled Dylan’s hips tight against her, as she stood. He reached around her tits and embraced her. “What now?” he asked, kissing her neck while still buried within her. She smiled, “A snack to recover my energy.” Their bodies separated and the still-sensitive head of the cock plopped out her clinging lips. Sara reached between her legs and inserted two fingers to scoop the cum which dripped from her well-fucked hole. Before she could complete the mission, she heard the sound of a key slipping into the knob, unlocking the bedroom door. Sara’s heart nearly stopped at the sound of the locked doorknob being twisted and turned. Then the siblings heard a key slip into the lock as the knob now turned without resistance. Only their Mother had the bedroom key, and in a flash, she entered the bedroom and shut the door, locking it once again. “You two were almost caught,” Mom fumed. “There were inquiries about strange noises in here. I told your Aunt that you had a bruised rib from a recent skiing trip.” The siblings stood frozen as Mom approached them while they were still exposed after having finished fucking. Sara pulled her dress on and stood upright. “Mom, you shouldn’t be here.” “We have a party to host,” Mom countered. “And the noises you two have been making are unacceptable.” Dylan blushed, with his penis still out. “Sorry.” “Don’t be sorry,” Mom replied. “Get cleaned up. These smells are potent and the last thing we need is for anyone to notice.” “There’s plenty of tissue,” Sara noted. Mom shook her head. “No, that won’t do. I can smell both of you. The fragrance is strong, since you’re both young. If you walk down the hall, others may smell it.” “What do you suggest?” Dylan asked, with fluids dripping from his cock. Mom sighed. “The things I do for my family.” The siblings froze in place, stunned, as Mom dropped to her knees. Sara was in awe of her Mother, who lifted her dress and went to work eating her cunt. It was her first time being eaten by another woman and it was spectacular. Sara closed her eyes and tilted her head back as the cum cocktail was being sucked out of her little hole. It was pleasure Sara never knew she needed. Mom darted her tongue inside her trembling daughter, cleaning every inch and centimeter, as deep as she could go. When she was satisfied that Sara’s cunt was cleaned, she pulled away, giving her daughter a brief visual inspection and nodded to herself. “You’re so good at that, Mom,” Sara whispered. “Not that you should have known,” Mom said, licking her lips. “Dylan, you’re next.” Dylan sat on his bed. “Whatever you say, Mom.” His cock had become rigid again, while watching the two busty women. In an instant, Mom turned her attention toward the wet cock, bending down, she was taking it into her mouth to suck the excess cum that lingered. It was more of a maternal duty than anything else. But it was just as explicit as any porn scene. Her lips wrapped around the shaft and she gave hard, powerful sucks. As she watched her Mother go down on her brother, naughty thoughts arose in Sara’s mind: 'There it is. Here’s your chance. Mom deserves a little relief. And I want a taste. I bet she’s delicious.’ Sara got on her knees, right behind her Mother, and lifted the back of her dress. She pulled the panties to the side and pressed her lips there, making Mom squeal for a moment. Just then Dylan blasted his load into his mother’s mouth. She swallowed it all, then turned her attention to Sara. “What’s gotten into you?” Mom asked, spitting the cock out of her mouth. Sara darted her tongue in her Mom’s asshole, then brought her tongue down to get a taste of cunt, lapping her tongue inside. Mom seemed rather aroused (and tasted like it too.) When Sara rose & moved around, she kissed her Mother on the lips. Mom was hesitant at first, but went along with it and their tongues wrestled with family fluids. After a few moments, Mom broke the kiss with her daughter and touched Sara’s cheek tenderly. She kissed Dylan on the tip and stood. “Alright, my two darlings, that’s enough,” Mom said. “Get dressed. Downstairs in one minute.” The siblings dressed quickly, checking each other for any telltale signs of their incestuous coupling. Neither of them minded the saliva as they wore their clothes. It would dry soon enough. Dylan was content with just pulling his pants up. Meanwhile, the ladies shared the mirror and fixed their dresses and hair, not to mention making sure their lipstick hadn’t been smeared. Clinic Reports Dr. Ledgard put the final touches on the report while sitting in the lab. Other researchers were there, monitoring heart activities and brainwaves from the two subjects. In a glass room, which the researchers were focused on, Sara was riding her brother on a bed they had set up. The siblings were naked as they had intense sexual intercourse with lust-fueled abandon. They were bashful at first, as anyone in that situation would be, but once they got started, they were unstoppable. “You’re a true genius,” General Hamilton said, observing the vigor of the youthful coupling on the other side of the glass. “I’ve always had faith in you, this is a job well done. I’m recommending you for a promotion and a generous pay raise.” “I don’t do this for money,” Dr. Ledgard replied. “No? Then what drives you?” “Knowledge,” the doctor responded, looking at the incestuous coupling once again. The siblings finished their strenuous loving-making session and Sara collapsed onto her brother, with her breasts resting on his face. Her pink nipples were hard and the brother took it upon himself to suck on them. When the researchers called for an end to the session, Sara climbed off her brother, and a trail of thick fluids leaked from between her legs. Sara cupped her buzzing cunt, catching the fresh cum, wiping it with her fingers, then brought it to her mouth. She licked her fingers clean. Sara knelt before her brother and cleaned with her mouth and tongue. According to daily reports that Sara and her brother had submitted, this was routine for them. Foreplay, sex, and 'oral cleanup.’ Their mother, it seemed, had helped ensure that everything was under control. Mom was the glue that held this experiment together. Post Notes: What was not yet asked by the primary test subject, was if Dr. Ledgard could administer and antidote treatment. He was still working on that, and relieved that he still had more time. As of now, all he could direct is a cessation, and hope that it would taper off, and perhaps a placebo impact might strengthen the restoration of the inner resolve her moral values once had in her life. As for Dylan and Julie, Dr. Ledgard could only hope that the social dynamic in the family would restore them to their previous standards of behavior. But that depended wholly on Sara’s restoration; when and if she sought it. By HeyAll for Literotica