The instant we finished our last assignment of the day -- a short worksheet on Native American migrations during the early colonial period, which we were allowed to work on together -- my sister took me by the hand and briskly led me out of the classroom. Our teacher had given us permission to leave early, as soon as we had completed the assignment.
We didn't bother packing up our books and bringing them back to our rooms for studying later on. There was no time for that. I was so eager to be back inside my twin sister that it almost felt like a physical ache coming from my crotch. I wondered if Julia was feeling the same thing.
"You can get your books later," Mom spoke loudly from behind her wide teacher's desk as we made our way out of the classroom. "And don't forget to grab a towel!" she yelled after us.
"Yes, Mom!" we called back in unison. We stopped by the downstairs bathroom to get an old towel. Apparently there was no time to travel up to Mom's bathroom for one of the nicer ones.
______
As I expected, Julia was leading us back to the living room. We stopped in front of the couch and my sister turned around and smiled excitedly at me.
My hand went up to her neck and drew her face to mine. I kissed her soft lips and she kissed me back, and we kissed again and again, and I was not aware of it but my right hand had wandered down from her neck to her left breast, and I fondled it in my fingers, and her nipple grew hard.
"Mm..." Julia moaned lightly as we made out. Soon I decided it was not enough to touch her outside of her clothes.
But before I could pull my sister's shirt off, she asked me: "Whaddaya wanna do first?" Her eyes were wide and red and she looked deeply into mine.
Remembering our lessons, I answered: "I should make you cum first, right?"
"I guess," Julia said disinterestedly. "Can I suck it first?" she asked, and I assumed she was talking about my penis, which was currently raging against the interior of my jeans.
"Sure," I swallowed, and she quickly went to her knees and began undoing my belt and my button and my zipper. She handled them so quickly that it was as if she did all three at once. In seconds my pants and boxers were at my ankles and I could feel my sister's warm breath against the underside of my penis, which was pointing straight up.
So I was right: she was talking about my penis.
"I just wanna..." Julia said thoughtfully to herself as she took the base of my shaft in her right hand and pointed the whole unit down towards her mouth. She flicked her tongue over the tip. As she drew away, a strand of precum connected her lip to my penis.
"There's already some coming out..." she said to herself after swallowing. Now she came back and slurped the head of my penis into her mouth. She began sucking, but only taking the head into her mouth, constantly dragging her lips over me, occasionally letting me fall out of her mouth so she could quickly swallow and then return to business.
It seemed to me that Julia was enjoying herself, and that she was doing this more to satisfy her own personal desires than she was to make me feel good. That made pretty good sense: I felt the same way about going down on her. It was cool that doing that felt good for her and would eventually make her cum, but honestly my biggest desire was just to taste her body and experience the texture of her delicious vagina against my tongue and in my mouth. The best part was when she finished. There was always so much fluid. It tasted so good.
I'm still so glad that she seems to feel exactly the same way towards me.
_____
"Oh!" I heard Mom exclaim from the hallway. "I thought you guys would be in one of your bedrooms. You don't mind if I get started on dinner in here, do you?" she asked casually as she made her way into the kitchen.
Our living room and kitchen are right next to each other, with no barrier between them at all.
"I'm gonna start getting dinner ready. You kids all right with hamburgers?" Mom asked, crouched down with her back to us as she rummaged through the fridge for ingredients.
"Sounds great!" I said, not looking away from my sister's face, which contained most of my penis. For some reason, whenever she puts it in her mouth, I can't look away. It's just so amazing to see it disappear between her lips.
"MMmm-hmmmm!" Julia made an affirmative noise without taking me out of her mouth.
"All right, all right," Mom agreed. "I'm gonna put on a show while I work in here..." Mom picked up the TV remote from its usual resting place on the kitchen countertop. She opened Netflix and put on the Reba McEntyre sitcom show, but at a low volume. My sister and I tuned it out, and I suspected that Mom did as well, at least for the most part. There was something else going on that Mom seemed to be more interested in.
Julia began to work my shaft into her mouth, going down a little bit farther each time.
"Robert, did you make your sister cum yet?" Mom asked us as she was turning ground beef into hamburger shapes.
Julia let me fall out of her mouth and answered for me: "No, but that's okay, I just wanna suck Robert's penis," she explained before quickly stuffing me back into her mouth. Her tongue glided along the underside of my shaft.
"Honey, I think you should cum before you guys go very much further," Mom advised us from the kitchen. "You might regret it if your brother finishes before you do."
My sister rolled her eyes with my penis still in her mouth. "All right, let's do this real quick," she sighed, sounding disappointed that she had to stop sucking. I wanted her to continue, but I wanted to make her cum even more. I mean, don't get me wrong, I like orgazming myself -- it's mucho, mega fun, especially with my sister -- but for some strange reason, I wanted to make Julia cum even more. Is that weird? Is that selfish?
Julia began to quickly undress herself. I was ready to chow down, but as my sister sat down on the couch and opened her legs, she had a different idea: "Can you put it in? Maybe you can make me cum like you did with Mom yesterday. You know, when she did it real fast?"
I remembered the day before. Julia was feeling nervous about our first time inserting my (apparently large?) penis into her vagina, so she had asked Mom to demonstrate. And we did, so Mom was technically the first woman I ever had sex with. Before Mom would let me and Julia get back to our education, she somehow used my penis inside of her to quickly give herself an orgasm. In just a few seconds, her vagina had squeezed me out, and ejected hot fluid onto my genitals and torso.
Mom was putting hamburgers in the frying pan as I got into position in front of my sister. Julia looked down excitedly at my erect penis, which swayed in the air as I got into position. Her eyes closed as I slid into her. Not knowing any better, I followed my instincts and quickly got into some wonderful, super-basic, in-and-out motion, fully in and then almost fully out, repeating that way. We had done this before, but I was still amazed at how good it felt.
Who knew brothers and sisters could have so much fun together?
Mom looked over at us. "Do you guys want some pointers? I mean, only if you want. Julia, I can show you how I did that yesterday, if you want?" she suggested.
"MMMMmmrrrgggh...." Julia groaned. I took myself out of her so she could speak. My penis stood at attention over my little sister. It was eager to get back to work.
"Show me, show me!" she exclaimed. Mom walked over and knelt down beside me on the floor.
"Okay," Mom began. "What you want to is angle your body so that the top of your brother's penis -- right about here --" and she ran her fingers gently along the top of my penis, around the area where the head meets the shaft -- "and you want this part of your brother's penis to rub up against the top of the inside of your vagina. Does that make sense?" As Mom spoke, her hand had gently wrapped around my penis, and she was holding it while lovingly moving her thumb back and forth over the head.
"I think so... thanks, Mom..." Julia said. Mom reluctantly let go of me and made her way back into the kitchen.
"Robert, it's best if you stay mostly still, and let your sister get into the right position. It's easier for her to feel the right spot than it is for you. But over time, you'll both get the hang of it."
I agreed: I inserted myself partially into my sister, and left the rest to her.
_____
Julia's lips pursed in a look of concentration. She wiggled her body around, changing the angle of insertion until she seemed to think she had it just right: her back was actually hunched forward a little bit, with her butt almost partially lifted up off of the couch. This changed the angle so that the top of my penis was pressed hard against the top of her vagina.
Julia began to grind against me in this position, and her breathing became starkly more pronounced the moment she began. Mom glanced back from the stove: "I think you've got it," she told my sister.
