The Great Experiment: Part One [Siblings/Milf]

How could I have known my first sexual dream would be a sign? It totally threw me off, seeing as my dreams were typically… non-sexual. But the night before my life took a dramatic turn, my mind concocted a visual and physical experience that unlocked another side of me.

It was almost as if I was preparing myself for what was to come.

I was sitting at our swimming pool with my feet in the water. It was way past midnight and I couldn’t sleep.

“Mind if I join you?” My mother entered the dream space.

“Sure.” I smiled and looked up as she took off her satin robe.

And up to that point, there was nothing strange about the dream. But then I noticed that her one-piece swimsuit was stitched specifically to compliment every curve of her body, which was something I never would have paid attention to.

Then she casually stepped into the pool and started swimming a few lengths.

I watched her cut through the water like a beautiful mermaid, only to pop out and land on my lap with her arms crossing my thighs. Then she stared up at me as she rested her chin on her arms.

“Talk to me.” She probed with her breasts pushing against my shins, making me very self-conscious about something I wasn’t supposed be self-conscious of. “Are you happy?”

“Of course I am. You know that.”

My mother shuffled higher up my lap and reached for my cheek, which she lovingly squeezed. Little did she know her forearm was resting squarely on my cock. At least, that was what it seemed like.

I couldn’t just push her away. Not only would it have been rude, but it would also have been disrespectful.

“Honey,” She ignored the low pulsations of my growing erection underneath her resting arm. “You look distracted. Are you sure nothing’s wrong?”

Telling her the truth wasn’t an option, especially since she was the one making it happen. So I had to keep the conversation going before my mother could figure out what my distraction was.

“You’re right. I have been distracted lately. But you know me. I don’t linger on the negative.” I acted aloof while I hoped the stress of the oncoming humiliation would make my cock soft again.

“That’s my boy.” Mom said while she tapped my thigh. “But you can still talk to me if you need something. Okay?”

I thought I was doing a good job of hiding my lust.

But then she looked down, towards her arm, as if she could be feeling something very inappropriate.

I felt my face turning bright red. And there was nothing I could do to stop my blatant erection from growing.

Instead of removing her arm, or simply swimming away, mom laid her head on my lap and applied even more pressure.

She was obviously ignoring my poking rod. As if stabbing into her forearm was a perfectly natural reaction. And her floating in place only made it worse.

“Mom,” I wanted to try and move, but she wasn’t having it.

“Oh come on, just a few more minutes.” She blew off my attempt, only to replace her forearm with the side of her face.

I leaned back as her cheek brushed my manhood. It was the strangest feeling that wasn’t all that unpleasant. In fact, it felt kinda nice.

But before the situation could get more intense, I shot up in my bed like I just woke up from a nightmare.

Only, it wasn’t.

Part One

That Saturday morning, I made a point not to deviate from my typical routine. With that sick dream stuck in the back of my mind, I’d have some breakfast, take a shower, turn on my computer, and get lost in the digital world until I couldn’t keep my eyes open anymore. Hopefully, after a day or two, the dream would disappear on its own.

But as I shuffled down the stairs on my way to the kitchen, I found my mother and sister, sitting in the living area – waiting for me.

And the way they looked in my direction made it seem like I was walking into an intervention. Like they were about to help me get off crystal meth or something else I never bothered experimenting with.

“Mom, Michelle,” I suspiciously called them out. “Did someone die?”

The last time I found them like this, they broke the news of my dad passing away.

“No, honey,” Mom reassured me before glancing at Michelle, as if to check whether they were still on the same page about going through with whatever they were planning. “Nobody died. But I do want to talk to you.” She gestured to the couch across from her and my sister, indicating that I needed to get comfortable.

Which I did.

And I was starting to get concerned too, even though I still didn’t have a fucking clue what was going on. Then mom carefully started to explain.

“Robbie, sweetheart, you know I’ve always tried to keep you happy, right?”

“Yes.” I answered with a degree of speculation.

“Your dad and I agreed to let you homeschool, even though we didn’t think it was the best idea.” She went on to prep me for something. “And we never forced you to make friends, or even to have hobbies. Correct?”

“I’m aware of all the favors, mom.” I tried not to sound snappy or irritated, because I genuinely appreciated them respecting my wish to live a mostly solitary life. Simply put, I never felt the need to interact with people. Thoughts and feelings of strangers never interested me, unless they were packaged in a good book that I could pick up at my leisure.

I preferred honing my own skills without sharing the experience with anyone.

“I’m saying these things because I have to draw the line somewhere. And if your father was still around, he’d agree with me on this.”

“Mom, what are you talking about? Why do you have to a draw a line?”

“Honey, you’re twenty years old and you never leave the house. For anything. And that is simply not healthy.”

“Is that what this is about? Me not going out of the house?”

“You have to experience the world, Robbie. And it’s not going to happen when you are locked in your room all day.” Mom sounded more serious than ever. “Now, I know this is very hard for you, which is why I’m going to offer you a proposition.”

Saying it was hard on me could have been considered a huge understatement. Make no mistake; I wasn’t afraid of the outside world. It wasn’t that interaction and fresh air scared me.

I just wasn’t interested.

“I pay rent. I’m neat.” I defended my case and purposely ignored having to negotiate any proposition involving me leaving the house.

“It’s not about money or a clean room.” She clarified. “It’s about your mental health. I mean, your sister has a lot of friends, and look how happy she is. Even I love my social life, Robbie.”

“Michelle is a senior and cheerleader in high-school, mom. Her friends are as shallow as they are stupid. But you don’t see me interfering, do you? If anything, you should be focused on saving her, not me.”

Michelle didn’t appreciate my comment, but mom was ready for any distractions I could come up with.

“I’m not going to argue, Robbie, because we both know you don’t agree with me on this.” She stopped the debate before either of us could get worked up. That didn’t mean I was off the hook, though. “So, I’m coming back to my proposition, and you have two options. You either participate in my experiment, willfully, or you find another place to live.”

As I opened my mouth to point out how appalling and unfair the proposition was, my mother cut me off.

“Let me finish, honey. Because after the experiment, if you still want to hide away in your room, I’ll never interfere with your lifestyle choice again. I promise.”

“You mean, I can go back to my normal life after?” I asked with a glimmer of hope.

“Yes. You have my word. But for the next couple of days, you have to do what I tell you. Okay? Do we have a deal?”

It sounded simple and easy enough. Until mom cashed in on our deal the moment I nodded in agreement.

“Fine. Just a few days. Then you leave me alone. Both of you.” I made my demands.

“Excellent!” She hopped where she sat next to Michelle, who seemed to be strategically quiet since the ‘intervention’ took off. “Let’s do some questions first. Then we can take on the first experiment.”

“You want to start right now?”

“Well, it’s not going to take all day, honey. Ten, twenty-minutes, tops.” Mom said while handing a pen and pad to Michelle.

With pen and pad in hand, my sister came into the conversation with a sly grin.

“First question, do you know about masturbation, and are you familiar with the experience?” She definitely enjoyed asking me something that made me feel completely awkward.

“Jesus,” I reacted. “Are you serious?”

“Honey,” My mother quickly intervened and reminded me of my options. “Participate or move out. Don’t forget about our agreement.”

“Yeah, it’s still pretty fresh in my memory, mom.” I oozed with sarcasm. “But don’t you think this a little personal?”

The truth was I never had the urge to masturbate. As far as I could remember, I was asexual in every sense of the word. Sex to me was a waste of time and energy that could have been spent evolving. And I could never understand why everyone made such a big deal about it.

“Do you want Michelle to ask you again?”

“God, no.” I prevented my sister from repeating the most uncomfortable sentence I ever heard. “And to answer the question, yes, I know what masturbation is. As for trying it myself, no, I haven’t.”

“Was that so hard?” Mom added a little sarcasm of her own.

“Apparently not.” Michelle cleverly got her vengeance for what I said about her friends, making my mom giggle in the process.

“Next question, Michelle.” Mom abruptly stopped snickering when she noticed I was on the edge of packing my bags. She wasn’t going to say it, but she didn’t want to me move out.

Especially not after losing dad a few years ago. He died young, but he made a big impression while he was around. Of course, everyone expected me to follow in his footsteps, which I didn’t.

“Do you ever look at adult magazines or films?” Michelle continued to be professional and slightly patronizing.

“No.” I didn’t even hesitate, because I didn’t want to give her anymore satisfaction.

“Are you attracted to men, women, or both?”

“None of the above.”

It was clear that neither my mother nor sister could understand my answers. And the weird part was that they knew I was telling the truth. But when Michelle looked at mom regarding my last answer, she dropped her snarky attitude and traded it for some concern.

“You’re not attracted to anyone?” Michelle found it difficult to wrap her head around the concept.

“No. Next question please.” I was keen on getting the weird experiment over and done with.

“But, honey,” Mom put the questionnaire on hold. “That’s a problem. Don’t you think?”

“How is it a problem?”

“Because people need people, that’s why. And I think you just haven’t realized it yet.”

“Mom, this isn’t something you can make me realize. I don’t like people. It’s just how I am.”

But telling this to my mother was a complete waste.

She and my dad were high-school sweethearts, prom king and queen with large social networks. Their only daughter immediately followed in their footsteps in terms of building her social status. But their eldest son, on the other hand, acted as if he came from another planet.

Thus, she was never going to accept that I was who I was.

“You know what?” She said. “Forget the questions. Let’s just move into the experiment. Okay?”

Michelle set aside the pen and pad aside before standing up and coming towards me. She stopped just a few inches from my face, awaiting her cue.

That was when I got really nervous.

“Robbie, honey,” Mom used that ‘preparation’ tone again. “Michelle is going to kiss you now. And I want you to kiss her back. Okay?”

“Mom, I’m aware that I’m strange and everything. But there are people who would consider this border-line insane.” I pointed out that making out with my own sister was much weirder than being a recluse for the rest of my life.

“This is not a normal situation, is it? So, why don’t we just focus on what’s important, which is to find out whether you really want to die alone.” Mom stood her ground and gave Michelle a nod to go ahead.

“Ready?” Michelle turned back to me while leaning in.

“Wait a minute. What are you getting out of this?” I stopped Michelle as she was about to pucker her lips.

She got this big smile on her face before she answered, “A car.”

“What?!”

Of course, I was not happy.

She was being rewarded with expensive luxury items for torturing me?

“Focus, Robbie. I’ll buy you a car too if you ever decide to learn to drive. But first, we have to get you out of the house. Now, please kiss your sister already.”

Michelle took the initiative and prevented me from protesting any further by grabbing my face and pressing her lips against mine.

At first, I was disorientated.

My immediate instincts were to push her away. But the longer the kiss lasted, the more I melted into it. And then she parted her lips, which she used to massage and brush against mine.

And when I lightly and unconsciously began to mimic her actions, I felt the tip of her tongue, slipping into my mouth.

The most thrilling sensation was spreading across my nervous system, especially when Michelle pressed her body into mine and wrapped her arms around my neck. Gradually, her tongue became more involved, but her lips weren’t slacking off either. But it wasn’t just the physical contact that overwhelmed me. I was also getting distracted by Michelle’s warm breath and sweet smell.

Everything about the ‘experiment’ had me so caught up, I didn’t notice my first ‘conscious’ erection. In fact, Michelle was the one who indirectly pointed it out when she discreetly grated her thigh against it.

I wasn’t sure how long the kiss lasted. I just know that my dick transformed from a soft piece of flesh into a straight plank against my sister’s hip.

Then Michelle unexpectedly broke away and exposed my erection to our mother. “We have signs of life.” She sounded incredibly proud of herself.

But it was my mother’s excitement that shocked me the most. She almost jumped out of her chair when she saw the front of my shorts, risen like it was a pitched tent. “Congratulations, honey. The first experiment is over. And you did great.”

I instinctively covered my erection with my hands, but it was too late.

Mom and Michelle got what they wanted as they left me in the living room, while I struggled to figure out what they were up to.

*If you like the story so far, the rest will be posted directly on my profile*

Thanks for reading!

Source: reddit.com/r/Erotica/comments/rej0nt/the_great_experiment_part_one_siblingsmilf