Bacseat Brother
Taboo/incest Story

Bacseat Brother

by Snowcrest 18 min read 4.8 (263,300 views)
creampie romantic fingering grinding bac seat masturbation brother sister incest ticling
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Author Notes

This is actually the second brother/sister story I ever wrote (before

Stimulation Club

), but for whatever reason I felt like it wasn't good enough to post. I've had a change of heart though, so here it is. Backseat incest has always been a favorite setting of mine since it was what got me into this genre in the first place. Here's my take on this classic, I hope you'll enjoy it.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Backseat Brother

"Grace, come on," Evan shouted up the stairs, drawing out the final word. "We were supposed to have already left by now."

"I'm coming, jeez. Cool your fucking jets," I yelled back. Slamming my body down onto my suitcase, I finally managed to get it to compress enough that I was able to finish zipping it up.

"Language, young lady!"

I rolled my eyes. Of course our mother happened to be in earshot when I was cursing out my brother. We got along fine, as well as siblings could I felt, but sometimes he just managed to rub me the wrong way. Grabbing a hair-tie from the top of my dresser, I quickly pulled my shoulder-length brown hair up into a ponytail before taking a look at myself in the full-length mirror.

Smiling, I gave myself a wink, my green eyes flashing playfully. I wasn't wearing anything fancy, just a white blouse and a checkered skirt that dropped right below my mid-thigh, but I thought it was a particularly cute combo. Not that I had anyone to dress up for. Pushing that overly negative thought to the back of my mind, I picked a stray hair off my tights before turning away.

"Grace--"

"I'm coming!"

Grabbing my bag, I grunted as I pulled it upright. Maybe I

had

packed too much, but we were going to be gone for a full two weeks and I wanted to have plenty of outfits to pick from. Who knew, we

were

going to the beach after all. Maybe I'd find a cute guy who'd appreciate my wardrobe--before taking it off me.

I ended up needing to slowly drag the suitcase down the stairs, one steady step at a time since it was too heavy for me to carry. Evan was watching from the bottom the entire time, an amused look on his face.

"Think you packed enough? I'm not sure that's even going to fit in the van."

I paused halfway down, confused by what he meant until I remembered that our parents had ended up renting a van for us to be able to pack everything for the trip.

"It'll fit," I said, resuming my way back down one slow step at a time.

"If you say so."

"You know, you could be a gentleman and offer to help your poor little sister carry her bag down the stairs."

He was only a year older than me at twenty, but it was a long-running joke between us that I got special treatment from our parents for being younger.

Evan's sapphire blue eyes twinkled up at me. "You're right. I could."

"Jerk."

"Honestly, I'm not even sure I could lift that thing," he said with a laugh.

Finally reaching the bottom of the stairs, I was forced to concede that maybe I

had

gone a touch overboard. Just a touch though.

"By the way, you don't need to let everyone know when you're having an orgasm, sis," he said as I passed him.

Freezing in place I spun around to face him, my hair whipping over my shoulder. "What the fuck?"

"I'm coming,"

he replied, doing a horrible job of mimicking me in addition to making it sound far more like his interpretation of the words than what I'd meant.

I stuck my tongue out at him. "Haha, very funny. Not surprising you don't know what a woman's orgasm sounds like." It was a low blow, and I instantly regretted it as soon as I said it. Evan's face immediately fell, only making me feel like even more of a bitch. Neither of us had ever dated anyone seriously since we were both incredibly introverted and shy around strangers, making my comment as hypocritical as it was mean. "Evan, I'm sorry. I didn't mean--"

"Na, you're right," he said, cutting me off and forcing a clearly faked smile. "Probably never will."

"Oh, don't be so dramatic," I began, but he pushed past me before I could finish and disappeared into the garage. Mentally kicking myself, I followed behind him, at least able to move a bit faster now that I could rely on the suitcase's wheels. Certainly not the greatest start to a vacation, but I was sure I could make it up to him. Somehow.

Stepping into the garage, I found my parents finishing up with packing the van and realized that Evan hadn't been exaggerating--the car looked like both the trunk and the front seats in the back were already completely full, making me wonder where we were even supposed to sit.

"Uh, what do I do with this?" I called out, dragging my suitcase behind me.

My dad turned to see what I was talking about, his eyes widening as he saw my bag. "Fuck. I knew there was something I'd forgotten about."

"Tom!" My mom slapped his arm, as intolerant of swearing as always.

Ignoring her, he did a quick pass, looking through the car before glancing over at my bag dubiously. "I think the only place left is in the back seats, but it's already pretty cramped back there and that's where we planned to stick you and your brother."

"She'll just have to put it in her seat and then sit on her brother's lap," my mom said as if it wasn't the most fucking insane sentence that had ever come out of her mouth.

"What?!"

"Wait, what did you just say?"

Evan and I spoke at the same time, our shocked responses overlapping each other.

"Look, I get that it's not ideal, but what else are we supposed to do?" she asked with a shrug. "Grace is smaller than Evan is so it makes more sense than the other way around."

"I can take a second car," I said, trying to come up with

any

other plan.

Unfortunately, my dad was the one to shake his head. "That's going to mean twice as much gas. The whole point of the van was to avoid that. No, I'm afraid your mother's solution is probably the best option. We'll make sure to stop often if you need to get up and stretch your legs." With that, he walked over and took my suitcase from my numb fingers before carrying it over to the car and shoving it into the backseat.

Sure, it wasn't like it was the end of the world, and I wasn't even remotely worried about my brother taking advantage of the situation to do anything inappropriate, but I

was

wearing a skirt and even ignoring the awkwardness of it all, spending hours sitting on my brother's lap was not my idea of a good time. Glancing over at him, I was at least relieved to see that he seemed as reluctant as I was.

A small part of me was hopeful that we could instead squeeze in side by side, but even that was dashed to pieces as I peeked through the back window and saw just how little room was left with my huge suitcase now taking up what had been my seat. If I'd known this was going to happen then I might have brought fewer clothes, although, honestly, probably not.

"Right, well, that should be everything now, I think," my dad announced, dusting his hands off. "I'll get the house all locked up, you three should hop in the van and get ready to head out. The beach awaits!"

Evan slowly walked past me, giving me an apologetic look as he ducked his head to climb into the back seat. "Sorry about this, sis."

I waited a moment for him to get settled before taking a deep breath and following him in. "Why are you apologizing? This isn't your fault," I said as I took in the situation.

My brother was sitting in the middle seat, flanked on either side by each of our suitcases and a bunch of other smaller boxes and bags that had been packed into the space. The result was a narrow slot that didn't even leave enough room for him to spread his elbows out very far. And we were cramming two people into it.

"Yeah, but you're getting the short straw here, by a mile. I'd offer to switch, but I can't imagine you'd want me crushing you."

Crushing felt like a fairly large exaggeration since he was in pretty good shape, but he was also right in that having me on top would be the more comfortable option of the two. Doing something no sister should ever do, my eyes briefly flicked down to his crotch. Evan was wearing a baggy pair of shorts to accompany his T-shirt, and, thankfully, I couldn't make out any bulges. Feeling my cheeks heating up, I decided to get this over with already.

"Close your eyes," I said as I stepped up into the van.

He gave me an odd look. "Why?"

"'Cause I don't want you staring at my butt, perv."

My brother's face went a deep red before his eyes scrunched shut. I couldn't help but laugh, both to let him know that I'd been teasing about the pervert part and because his reaction was pretty adorable. Clambering into the back to join him, I could only hope that he was still following my instructions as my ass inevitably passed directly in front of his face. Reaching back, I carefully tucked my skirt in so it would be resting between us before gingerly settling down onto his lap.

The first thing I noticed was that, despite not being very tall, the extra height from Evan's lap made it so the top of my head was very close to the roof of the van. The second was that even that high up, I still couldn't see the front window or even the back of my parents' seats--there was

that

much stuff crammed into the space between us.

"How is Dad even supposed to see out the back?" I called out.

A loud sigh drifted back from my mother. "I pointed out the same thing, but he said there was no other way to get everything in and that the side mirrors would be enough. I suppose if we really need to then we can ask the two of you to take a look."

"It'll be fine," my dad said, his head popping into view through the sliding door--causing me to jump slightly in surprise. His face wrinkled in a painful expression. "Oof, that does look pretty cramped. Make sure to let us know if you need a stop, okay?"

I nodded. "Will do."

"And don't forget that seatbelt. Safety first!" He disappeared from view and a moment later the sliding door slammed shut.

Rolling my eyes, I reached back to grab the seatbelt. I was fairly confident they weren't at all designed to work with two people, but worst-case scenario it would hopefully still help. Pulling it around us, I offered the strap to Evan since he would have an easier time snapping it into the clasp. I immediately gasped as he took it and clicked it into place, the straps digging into me painfully before I could pull out some extra slack.

"Oops, sorry about that."

"No worries," I told him, gently massaging my squashed boob. "I should have known to pull out more than normal."

"Everyone good to go?" our dad called from the front as I heard the engine turn on.

I nodded in response, before remembering that he couldn't see us. "Yup, as good as can be expected." It was actually better than I'd expected. While Evan's lap wasn't as comfortable as a seat cushion, it wasn't as bad as I'd been fearing.

"Let's get this show on the road then!" With that, we rolled out of the garage as my dad turned on some kind of news podcast and we began our trip to the beach.

"Um, Grace? Can I open my eyes now?"

I blinked in surprise, before turning to look over my shoulder, my eyes widening in shock when I saw that my brother's eyes were indeed still closed. "What the, of course you can, silly. Why didn't you open them as soon as I sat down?"

His eyes slid open to meet mine and I had to swallow and turn back around. Blue eyes had always been my weakness, but my brother's weren't supposed to have an effect on me. "Dunno. Didn't want to see anything I shouldn't."

Laughing I flicked my head back and forth. "Well, now you can stare at my ponytail all you want."

"Keep tickling my nose like that and you're going to make me sneeze."

"You better not get any snot in my hair," I snapped back, making sure to put enough levity in my voice that he'd know I was just messing around.

"I wouldn't," he replied. "It's far too pretty."

Blinking in surprise at the compliment, I felt my cheeks heating up once again. "Thanks, Evan. I'm... sorry about what I said earlier, at the bottom of the stairs. It was totally uncalled for."

There was an uncomfortably long silence before he finally replied. "Don't worry about it. 'Sides, you were just stating the truth."

I winced, unable to tell if I was helping or just making things even worse. Maybe continuing to talk about it wasn't the best idea, but I honestly wanted to make him feel better about the situation. "What happened with that girl in your biology class that you had a crush on? Sarah? Did you ever end up asking her out?"

He snorted, the gust of air surprising me as it hit my neck. "As if. Sure, she's hot as fuck, but girls like that don't go out with guys like me."

"What's that supposed to mean?" I asked, frowning.

"You know. Quiet nerds. I'm a loser."

Turning to look back at him again, I shifted slightly in his lap to be able to better face him. "Don't talk about yourself like that, Evan. You're a great person, and any girl would be lucky to have you. Personally, I'd love to date a quiet nerd."

It was his turn to blush, and I had to drop my gaze so that we weren't making direct eye contact as I realized what I'd unintentionally implied.

"Thanks, Grace. That means a lot to me." He cleared his throat. "Anyway, I don't even know

how

to ask someone out. How do

you

do it?"

My mouth fell open. "What? You think

I

know? Dude, I'm in my second year of college now and I've never had a boyfriend."

"I still don't understand how that's possible."

I laughed. "That makes two of us."

"There's no way guys aren't throwing themselves at you."

I arched an eyebrow at him. "What makes you say that?"

"Cause you're... you."

Frowning, I shifted awkwardly in place. "What's that supposed to mean?" My eyes flicked back upward and were instantly captured in an icy blue prison.

"You know...," my brother said, his eyes piercing into me.

I

did

know what he was trying to say--or at least, I thought I did--and, as a result, why it was so hard for him to say it, but for some reason, a part of me desperately wanted to hear the actual words. "I don't think I do," I said softly.

His throat bobbed as he swallowed deeply, his face now a blazing inferno. "Have you looked in a mirror? You're b--"

"Everything still alright back there?" my dad called out, interrupting Evan and shattering the moment.

"Yes, we're fine!" I shouted back, feeling irrationally pissed off at him right then.

"Alright, alright. Sorry, it was just pretty quiet. I expected more complaining."

"It's not that bad, actually. Better than I thought it would be," I replied as I turned back to face forward before setting down into my brother's lap once again. With all the adjusting I'd been doing, my skirt had ridden up slightly so that it was no longer fully tucked under me, but it was close enough, and trying to reposition it would likely be more awkward than leaving it alone.

I took a breath to try and still my racing heart, only realizing just now how rapidly it was beating. What had come over me? Why did hearing my brother call me beautiful cause butterflies to go crazy in my stomach? Shaking my head to try and clear it, I wondered what the fuck had gotten into me.

"Trying to make me sneeze again?"

It took me a second to realize what he was referring to before I laughed in response. "No, sorry. I forgot you were back there." Which was a blatant lie, considering he was the

only

thing in my head right now.

"Aww, I'm hurt," he said, and I could hear the fake pouting in his voice which only made me smile wider. "I bet you won't forget if I did

this

."

I shrieked as his fingers slipped under the hem of my blouse and lightly squeezed my sides. He wasn't even tickling me, but it had caught me by surprise and I

was

extremely ticklish.

"What is going

on

back there?" This time it was our mother, and she sounded mildly concerned.

"Mom, Evan is torturing me, make him stop!" I said, pitching my voice up to sound like a whining child.

"Just a bit of tickling," he replied, loudly enough for them to hear, and this time he began slowly moving his fingers across my skin. It wasn't even true, intentional tickling, but it was still enough to make me jerk around in his lap.

"Don't you dare," I gasped.

There was a brief pause from up front, followed by, "Aren't you both adults now?"

"Tickle, tickle, tickle," Evan burst out as his fingers exploded into motion.

I screamed, my legs thrashing against his as laughter consumed me and I desperately tried to get away. Of course, we were fastened together by the seatbelt, so no matter what I did there was no escape. In the background, I heard the volume of the podcast crank up--presumably to drown us out--but my entire world was consumed by my brother's fingers dancing across my skin.

In the middle of all the chaos, I realized that with all the writhing I was doing my skirt had completely slid out from under me, leaving me all but grinding my crotch into Evan's lap. It felt alarmingly good too, although I figured that was mostly because my clit had ended up lightly rubbing against my thighs. At almost the same time, everything came to an abrupt halt as my brother's hand came to rest on my right boob.

Gasping for air, it took me several deep breaths to mostly recover from what he'd done to me. All the while, my brother remained completely frozen, not moving so much as an inch.

"I'm sorry," he eventually said, and I could have been mistaken, but it sure seemed like he was breathing harder than someone who hadn't been the one getting tickled should have been. "I got a bit carried away. I never meant to--"

"Grab my boob?"

"Yeah. That."

"And yet you're still holding onto it," I pointed out.

His hand immediately pulled away, and my brain was so confused by that point I couldn't tell if I was glad or sad about it.

"I really didn't mean to," he said again, sounding completely distraught.

"Stop worrying about it. It was an accident and it's not that big of a deal." Although it kinda was, brothers were

not

supposed to grab their sister's tits.

"You're sure?"

"Sure. It's just a boob, and you only really grabbed my bra, if anything." It was true, but for the briefest second, I imagined his fingers instead sliding across my nipple, which had the unfortunate side effect of causing it to harden up.

"Well, I'm still sorry about it. I shouldn't have tickled you so aggressively."

"You shouldn't have tickled me at all," I corrected.

Evan laughed, and the feeling of his breath hitting the back of my neck sent a tremor down my spine, only confusing me even more. "I

had

to though, can't let you go about just forgetting me."

"Could. Not sure I really need a brother for anything, although I'm discovering that they make for a surprisingly comfortable cushion."

He laughed again, which had been my goal, and a second tremor ran through me. It felt weird to actively acknowledge it, but I realized that I was starting to get incredibly turned on. A small part of my mind was screaming at me to knock it off, to stop flirting with my

brother

--because we were

definitely

flirting at this point--but I silenced it. A bit of fun and games never hurt anyone.

"Oh they do, do they?"

"Yup." In an attempt to prove my point, I ground my butt down into him--a soft hiss escaping my lips as the action only further stimulated my clit. "Almost as good as a pillow." I flushed a bright red at the words, thankful my brother couldn't see my face as I imagined one of my favorite ways of getting myself off by grinding against a pillow.

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