He did feel almost completely normal. The only thing that seemed a little unusual was a light tingling sensation that was beginning to spread through his crotch. It almost felt as though his cock was a little more sensitive than usual, as though he was watching a porn video or on the verge of having sex.
“Yeah, I feel pretty much the same way,” said Mikhaela. Her breathing was a little heavier than usual, and Andy could see that her face seemed to be a little flushed, as though she was too hot.
“Well, I guess we just have to keep waiting then,” he replied. He stood up from the examination bed, and as he did, blood rushed back into his legs and lower half. His cock sprang to full attention in an instant, and he felt a strange pulsing sensation begin to spread from it into the rest of his body.
“Whoa, jeez,” he said. “Okay, I do feel a little weird…”
“Yeah, I don’t know, I think I do to,” said Miikhaela. She walked over to the bed and sat down on it, rubbing one of her hands up and down her thigh.
“Oh man, what the hell?” said Andy. He felt his fingers being drawn to his engorged member. It was so sensitive and hard, just aching for release, and seemed to have an almost magnetic quality to it that made him want to stroke it.
His sister was in a similar state, and then some. She was leaning back on the bed with one hand hovering just inches from hem of her skirt, as though all she could think of was rubbing her panty clad mound and getting off.
“Andy, can you look away for a second,” she whispered. “I need to…adjust my skirt, a little…”
Andy obliged, barely able to focus on anything other than his own problem. He looked over into the corner of the room, and found himself giving into temptation, rubbing his hard cock through his pants as subtly as he could, almost like a horny teenage boy trying to enjoy a dirty magazine in the library.
His sister’s moans began to pull him out of his reverie. He turned back towards the bed, and saw her sprawled out on top of it, one hand thrust deep into her panties and the other massaging her nipple. She had pulled both of her breasts out of her bra and low cut shirt, and the sight caused Andy’s mind to fog over with hot desire.
“Oh god,” she said. “Andy, I’m sorry! I don’t know what the pills did, but I have to, I have to,”
“I…I know sis!” cried Andy. He was tearing his own clothes off like a possessed man, and began pumping his naked cock as he watched her masturbate. The scene was so illicit, and the fact that she was his sister only seemed to add to the erotic nature of what was happening.
“Andy, please,” said Mikhaela. “Help me…”
She had pulled her panties all the way down, and was massaging her clit wildly. Andy stepped over to her, almost being drawn by a sexual gravity, and climbed onto the bed next to her. He found himself rushing, pushing his cock against her entrance and feeling the wet warmth of her cunt.
“Oh yeah, baby brother,” said Mikhaela. “Please do it, we won’t tell anybody.”
He teased his sister’s pussy with the head of his cock. A small part of him was holding out, screaming in the back of his head about how fucked up and wrong what he was about to do was. But it was drowned out by the sensation flooding through his cock, which seemed to ache with the need to cum.
He pushed forward into his sister and began to fuck her. With every forbidden stroke, Mikhaela seemed to writhe in pleasure. Her cries echoed off the walls of the examination room, and drove Andy to fuck her harder, enjoying the way he was making his sister feel.
“Fuck me Andy!” she yelled. “Don’t stop, fuck your big sister!”
“That’s right sis,” he replied. “I’m not going to stop. I’m going to keep going, you feel so good!”
Andy thrust into her with speed and grace, feeling her wet juices lubricating his path. His sister dug her nails into his back, urging him on. Her large breasts were pushed up against his chest, and he began to knead them. This is what he had thought about in his weaker moments of sexual frustration as a teenager, and now it was actually happening, almost as though through divine intervention.
Eventually, Mikhaela began to yell louder. She tensed up and dug her nails deep into Andy’s back, and then melted back into the bed. He began to fuck her even harder, grabbing her hips and pulling her into him as he pushed his cock deep inside her.
It was impossible for him to hold out for very long. Andy thrust into her a few more solid times, and then felt his cock explode, spraying white hot cum deep inside of her. His sister wasn’t on the pill, but he didn’t care, and it didn’t seem like she did either.
The two of them collapsed onto the bed, taking a moment to catch their breath before saying anything.
CHAPTER 3
“What…what the hell just happened?” asked Mikhaela.
“I don’t know,” replied Andy. Guilt was beginning to flood into his mind, along with shame, and regret, and dozens of other emotions. But strangely, he could still feel an intense lust that took predominance in his mind.
The door opened, and Dr. Thompson walked back into the room. Mikhaela scrambled to preserve her modesty, but Andy just sat up on the bed and looked at her. She was an attractive woman, and he felt his cock quickly becoming hard again as she smiled at him.
“That was excellent, a great success for our new drug!” she said triumphantly. “I just have to do one more quick examination before I let the two of you go home.”
The doctor walked over to Andy and ran her hand down his chest. He was naked, and the feeling of her soft fingers on his skin made ideas run wild through his head.
“We got quite the show watching the two of you through the mirror,” Dr. Thompson said to him. She had a stethoscope around her neck and she set it against Andy’s chest and listened to it.
He felt as though his heart was pounding just about loud enough to be heard even without it. Her face was close to his, and he could smell the doctor’s scent, and her subtle, flowery perfume.
“Your heart rate seems to be within the standard parameters,” she said. “That is excellent. I just need to check one other thing”
“Aren’t you going to take my sister’s, too?” asked Andy. Mikhaela was looking at the two of them curiously.
“No, we have enough data points for females at the moment,” she replied. Andy felt his cock growing even harder, and was a little shocked when the doctor took one of her petite hands and wrapped it around his shaft.
“What, what are you doing?” he managed.
“I just have to check the length and girth of it,” she said. “And to see just how…hard, you have gotten.”
She began to run her hand up and down his shaft, bringing her face down right in front of it and writing on a pad with her free hand. It felt amazing, and Andy quickly felt himself being brought back towards the state he’d been in before as she moved it around, examining it.
Dr. Thomson cupped his balls with her hand and rolled them around her fingers gently. The look on her face was one of a serious professional, but somehow it only made Andy horny to see how seriously she was taking her job.
“Alright, can you cough for me?” she asked.
He coughed, and felt his hips slide forward slightly as he did. The head of his cock almost made contact with Dr. Thompson’s mouth. She breathed out, and he could feel the heat on his cock as she did.
“Alright, now I just need to do a sensitivity check,” she said. “I know this might make you feel slightly uncomfortable, but please, bear with it. It’s for the sake of the study.”
Andy nodded, and the doctor took a small packet of some kind of lubricant out of her pocket. She poured it into her hand, and began rubbing it up and down his shaft. It felt amazing, and Andy couldn’t help but notice that a bit of her cleavage was exposed from the way she was leaving over, giving him a very nice view.
Mikhaela was watching from the side. Andy expected her to be embarrassed for him, or even upset, but was surprised to see that one of her hands had meandered back down to her cunt
. His own sister was fingering herself as she watched the doctor rub his dick, and he felt a strange mixture of pleasure and shame at the whole situation.
Doctor Thompson would occasionally squeeze his cock as she went, but for the most part she just stroked her fingers up and down, rhythmically. Her free hand had stopped taking notes and she had braced it against Andy’s thigh.
“Let me know if you get close to, well, you know,” she said to him.
He was already close, but the insane sensations shooting through his dick were too pleasurable for him to say anything. He wanted her to keep going, for just a little longer. It felt so good, and seemed like it would be a shame to stop her. Besides, it was a medical examination, and the doctor needed to make sure she did it properly, he told himself.
“Oh, okay doctor, maybe you should…” he started to give her the warning she had asked for, when he heard his sister moan out in ecstasy from the corner of the room. This, combined with Dr. Thompson increasing her pace slightly, pushed him over the edge. His cock began to spray out streams of cum, and they splashed onto what was directly in front of them, which was Dr. Thompson’s face.
“Oh, wow,” said the doctor. Her glasses were splattered with his seed, and a couple of drops managed to land on her lips and cheek. She licked her lips without realizing it, and Andy watched as this attractive, professional woman tasted his cum.
“I’m sorry!” he said. “I tried to tell you,”
“It’s fine,” said the doctor. She flashed him a smile and stood up, seeming to be a little dazed by the experience.
“Well, we have just about all of the data we need for today,” she said. “I’m going to send you two on your way. What I’d like, if you’re alright with it, is to give you a small sample of the drug to keep and try out on your own. Let us know if anything unusually happens with it. We will follow up with you at the end of the month.”
She thanked both of them, and then left the room, leaving Andy and his sister to try to make sense of what had just happened, and beyond that, what it meant.
CHAPTER 4
The walk back home had been silent and tense for Andy and Mikhaela. Neither knew what to say to the other, or even if anything needed to be said. Their experience in the clinic had been so outside their usual comfort zone, it almost threatened to upend all of the assumptions they had made about relationships, reality, and human nature.
Both of them had calmed down, at least physically. Andy’s erection had faded after his last intense and embarrassing orgasm. His sister also seemed to be back to normal, apart from her cheeks, which seemed to have taken on a new and seemingly permanent red color.
They both went in through the front door, still saying nothing to each other. Their mother, Vanessa, was making dinner in the kitchen and humming a song.
“Hey you two,” she said as they walked in. “How did the study go?”
Mikhaela said nothing, and immediately bolted for the stairs. Andy opened his mouth to respond, taking several seconds before answering.
“It was good,” he replied. “Definitely different from what I expected, that’s for sure,”
“Well that’s nice,” said Vanessa. “Dinner will be a little while. I’m using the crock pot tonight.”
Andy’s mom turned back to the food she was preparing. He felt his cock dance slightly as he looked at her, and figured it was an after effect of the drug. His mom was a gorgeous woman and looked like an older version of Mikhaela, except with bigger breasts, more pronounced hips, and a mature, almost cougar like aura to her. He shook his head and tried to force dirty thoughts out of his mind.
“Alright mom, I’ll be upstairs,” he said. Andy stopped on his way by the medicine cupboard in the kitchen, set the bottle of pills inside of it, and headed to his room.
He spent about a half hour on his computer, alternating between browsing internet forums and playing some video games. A knock at his door pulled his attention away from the screen.
“Honey, open the door,” his mom called. “I need to talk to you!”
Andy quickly made his way over and let his mother in. She walked into his room and closed the door behind her. She had a flushed look on her face, and stood very close to him as she began talking.
“Andy, honey, I…I,” she started, barely being able to get the words out. “I just need to…”
She stepped closer to him. He could smell a musky scent on her, and felt his cock tense up as she pulled him into a hug.
“Mom, what’s wrong?” he asked.
“I had a headache before and took some aspirin,” she said. “And I feel really strange…”
Andy recognized her behavior and realized immediately what was going on. His mother had taken one of the pills, and was now deep in the same state he had suffered from earlier that day.
“It’s okay mom, you’ll be okay,” he said. “I think if you just go and lie down, maybe get some sleep, you’ll start to feel-“
Vanessa cut him off with a kiss, pushing her lips against his and crossing a line that a mother should never cross. Andy felt his cock quickly hardening. It was different from earlier that morning, though. He could still think, and all of his cognitive faculties were telling him that he should push his mother out of his room and prevent them from permanently altering the safe relationship that they shared.
“Andy, please,” she said. “Just hug me close…I want to feel you Andy, you’ve grown so big,”
She began to massage his cock through his pants as she spoke the last word. It felt good, and wrong, and incredibly fulfilling sexually.
“Mom, I can’t,” he replied. “I mean, we can’t,”
“You’re so big and strong now, Andy,” she whispered. “Won’t you show mommy just what a big boy you’ve become?”
She kissed him again, and he felt his resolve give way as his mom pushed her big, soft tits against his chest. Vanessa grabbed his hands and planted them right on her mounds, and he began to grope them, feeling her nipples through her bra.
“That’s right sweetie,” she said. “It’s okay, it’s fine…”
He listened to his mother’s words, and began to pull her tight t-shirt up and over her head. She pulled his off him right after, pushing him over and down onto his bed. Her tits were perfect, and the next piece of clothing he took off of her, in a hurried, horny rush, was her bra.
He had surely seen his mother’s nipples before, but never like this. They were perfect, pink little buds that seemed to call to him and reflect the forbidden nature he was heading into. Andy leaned his face forward and sucked on one of them. His mom let out a moan and ran her hands through his hair.
“Oh god, Andy,” she whispered. Vanessa pulled her skirt down and slipped out of her panties. Her hands went to work on his belt, unbuckling it and pulling down his pants, and then his boxers. Before his mom’s pussy even started to make contact with his cock, he could feel the heat of it.
Vanessa took a detour, and brought her lips down to her son’s exposed member. She gave it several soft, slow lips before wrapping her lips around it and sucking hard.
“Mom, oh god…” he moaned. Vanessa knew how to suck a cock, and she worked her son’s tool with love and intensity. His hands wandered to the back of her hair and began to bob her head down in a sensual rhythm.
After a couple of moments, Andy felt himself lose control. He needed more. He grabbed his mom by the waist and almost threw her down onto the bed, mounting her and pushing his cock into her womanhood.
An illicit thought crossed his mind. He was pushing his cock into the woman that had raised him throughout his childhood. From the tightness of his mom’s cunt, it was almost unbelievable. But it was true, and the idea made the pleasure racing up his cock exponentially more vivid.
“Go ahead, Andy,” said Vanessa. “Fuck your mommy. Fuck me Andy, fuck me!”
At this point, he didn’t even need her to say it. He began thrusting into his mom as though she were the woman of his sexual fantasy. It wasn�
�t that far from the truth, as Andy had masturbated to her after peeking on her in the shower several times before.
The speed Andy was fucking her at was almost urgent. Vanessa was crying out, and Andy knew that the drug was amplifying the pleasure she was feeling by an order of magnitude. He began to play with her clit with his finger as he fucked her, and soon enough she began to writhe and twist into and orgasm.
“Oh god!” she cried. Vanessa threw her head back and let out a soundless scream of ecstasy.
Andy redoubled his efforts, letting his hips push against his mom as fast as they were able. It was almost like he was trying to destroy her cunt with his dick. He needed to fuck her. Something about the conquest went beyond mere sexual release. He needed to fuck his mom, and he needed to cum inside her, for reasons that he couldn’t understand or make sense of.
After a couple of frantic minutes, he began to feel the cum well up within his balls. He slammed into her with all the strength he had left, and felt his balls begin to explode cum deep inside her pussy. Andy made no attempt to pull out, and Vanessa made no attempt to stop him.
The two of them breathed heavy afterwards, both exhausted and in disbelief of what had just happened.
“Mom…I think you might have taken one of the pills that me and Mikhaela used in the study,” he finally said to her, the guilt forcing out a confession. “They made us, well, feel kind of like you’re feeling anymore.”
His mom was still under the effect of the drug, and began playing with his cock, determined to bring it back into a hard, erect state that she could use for her own purposes.
“Do you think you could get some more?” she asked.
END
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Anya Merchant
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