Backseat: Sister Rides Brother’s Lap by married_but_curious

Backseat: Sister Rides Brother’s Lap by married_but_curious

Discover a taboo adult sex story in "Backseat: Sister Rides Brother's Lap" that will leave you captivated. Explore the steamy and forbidden relationship between siblings in this thrilling tale. Read now for a tantalizing read!<br/>

Author’s note: This is a series. In chronological order:

Backseat Ride: Sitting on Son’s Lap

Backseat Ride: Son’s Sex Education

Backseat Ride: Fucking Sister / Mom

Backseat: Sister Seduces Brother

Backseat: Sister/Brother First Time

Backseat: Sister Rides Brothers Lap

***

I didn’t intend to cum, loudly, while riding my brother’s hard shaft in the back seat of a big black SUV. Especially while my mother, Aleja, drove.

Hmmm… guess that was an overly specific denial.

Take two. I didn’t intend to car-ride my brother, Lucus, AT ALL. Much less with a parent a few feet away.

And I REALLY didn’t foresee that turning into a threesome seduction with my brother and mom.

If all that seems TMI, bear in mind that I’m typing this one-handed on a keyboard into a story draft on Literotica, remembering, while I quietly jill off, rubbing my soaking wet pussy and clit…

Quietly, since my naked brother and mom are sleeping next to me on our king sized bed, my mom snuggled up to him from behind, her curves pressed against his strong back and firm butt, her smooth dark olive skin a lovely contrast to his paler, slightly freckled skin.

I don’t intend to hit ‘submit for publication’ on this story, because * someone * on my college campus would figure out it was me, and then the ‘coconut wireless’ (aka gossip) would commence.

Then, passing strangers on campus would see through my shy, demure facade and know what a perverted slutty girl I actually am.

***

This morning, my mom was driving my brother, Lucus, and me from Dallas to our house near Austin, in a big Toyota SUV she had bought for Lucus at a used car lot near his college apartment. It was a older Sequoia (a name just begging for sexual double entendres, but we’re allegedly better people than that), but with an immaculate interior. It was the perfect starter car for my 18 year old brother (who’d recently totaled my parent’s Lexus while driving it at over 100 miles an hour on I-80):

1) unlikely to break down much despite almost a quarter million miles on it

2) a massive amount of sheet metal between him and the questionable decision-making processes of a testosterone-poisoned brother who still hadn’t internalized that he wasn’t immortal

3) disposably inexpensive should situational stupidity result in a loud and violent demonstration of physics. Again.

Lucus and I talked non-stop in the back seat on the first part of the drive, a meandering conversation that turned into a spirited discussion of whether ‘red’ was a flavor when I got everyone a kolache, in the Czech village of West, while Aleja topped off the gas tank.

I opened the back passenger side door and got in, while Lucus took the seat behind mom. I reached forward and put my mom’s kolache on the center console.

“Thanks, Ciara!” Aleja pushed the button to start the big engine, and wheeled our SUV toward the access road running along the freeway. Once we were headed south again on I-35, she freed a hand from the steering wheel and took a bite of her snack.

Meanwhile, I handed Lucus his kolache.

He took a bite. “Mmmm. Hot dead deer. Whatcha get for you and mom?”

“I got us red flavored fruit kolaches.”

“Red ain’t a flavor.”

Offering him a bite of my kolache: “OK, then what flavor do you think this is?”

Chews: “Mmmhh. Hmm. Raspberry? Cherry?”

“Can’t tell?”

“Tastes mainly like cane sugar.”

“Soo… red flavored.”

“You bought it. What kind did you ask for?”

“Pointed and asked for two of the red ones.”

“RED ain’t a flavor!”

“I identify as a ‘red-kolache-eater’. Don’t be a bigot and deny my lived experience.”

Aleja began slowly weaving the SUV from side to side in her traffic lane.

“What’s with the weaving?” I said.

“I’ve lost my will to live. What with you two squabbling about the definition of ‘flavor’.”

“Lucus’ life will go a whole lot smoother once he accepts that I’m always right.”

Mom said, “There’s five words, Lucus, I’d like you to memorize, and use early and often if you get in an argument with your future girlfriend or wife.”

“Hmm?”

“I’m sorry. You were right.”

“What if she’s wrong, and I’m right?”

“If you’ve married someone smarter than you –”

“A mighty low bar,” I chimed in.

Lucus stuck his tongue out. “Ppppbth.”

“… which I highly recommend — she ain’t gonna be wrong often,” Aleja said. “Humble’s a lot better look than confident but wrong.”

Lucus looked at me, just a touch of a grin at the corners of his mouth. “I’m sorry. You’re right, dear.”

I scooted to the left on the bench seat, until our thighs touched. Put an arm over his broad shoulders. “Now try it without sarcasm.”

Softer: “I’m sorry. You were right.”

Wow. He’s pretty good at faking sincerity.

I kissed his cheek. Felt a tingle in my pussy, remembering how we’d fucked the hell out of each other the past couple of days. Lucus flicked his eyes toward the driver’s seat in front of him, then gave me a tiny shake of his head. A wordless, ‘No. Try to behave’.

I gave him a wicked look and kissed him gently on the lips.

He didn’t return the kiss, instead gave me a ‘have you lost your gotdamn mind, mom is right there’ stare.

I faux pouted, then leaned my head on his shoulder. Mmmmmm. He smelled so good.

Aleja said, “Wish to hell Cody had used these words every now and then. Maybe if he’d done that… oh, and not fucked every woman who’d let him… maybe I wouldn’t have had to file for separation.”

Lucus said, “Why are we visiting dad today, if you’re so over him?”

“My lawyer said I should make an effort to reconcile, work out our differences, before he drew up and served Cody with the divorce paperwork. And to take along a witness or two… that would be you and Ciara… so it’s not a ‘he said / she said’ thing.”

I said, “You’re actually planning on going back to Dad after he cheated on you with multiple skanks?”

“He said he’s made up his mind to re-commit to our marriage. I think Cody meant it in the moment, but… he’s a good looking guy with charm and lots of money. Plenty of women gonna want to take a run at him. And Cody can resist anything but temptation.”

A long pause. “I’ve gotta give it a try. I read him the riot act – I’ve got zero tolerance for him cheating on me any more. One more strike and he’s out.”

Lucus and I exchanged a look. He finally said, “Ummm, speaking of cheating, mom… you and I kinda fuc–”

“Kinda?” I said. “My understanding was there was a whoooole lotta f–”

Aleja cut me off: “That’s different. HE broke up with me. I was free to do whatever. If he’s truly repentant — I’m willing to give that whole ’til death do you part’ thing one last try.”

“Then you’ll kill him?” I said, brightly.

“Metaphorically kill, of course,” Lucus said. “The other way… soooo much paperwork and depositions. Totally not worth it.”

“Whole lotta snark filling up that back seat,” Aleja said. “We’re gonna need a bigger truck to hold it all.”

***

I must have nodded off, still cuddled up to Lucus, sometime on the ride through the monotonous stretch of countryside between Waco and Temple.

And had a hot sexy dream where someone was rubbing my pussy, making me horny —

I sleepily opened my eyes.

Oh. Fuck.

Lucus had a hand under my sundress, and had slipped a couple fingers under my panties. He was caressing my tightly curled pussy hair and gently rubbing my wet pussy lips.

I whispered in his ear, “Can I help you?” Putting a little indignation into it.

He nibbled on my earlobe, sending a sizzling jolt into my head. I suppressed a moan.

He whispered back, “Maybe you could pull your panties down?”

I whisper-shouted: “I wasn’t offering to help you grope me easier, dammit. Mom — two feet away!”

He slipped a finger inside my traitorous vagina, which was helpfully slick by now. “I’ll be quiet.” He kissed my ear.

I strangled back a moan. “Fu– How am I gonna be quiet when you -”

“Mmmm,” he said, starting to finger fuck me. We were still whispering. “Want me to stop?”

“Yes!”

“Yes… as in keep doing… this?” He touched my G-spot.

“I meant stop!” My hips kinda undercut my negotiating position by wiggling to get his finger back on the spot. And succeeded. “Ggggrrrruuuhh,” I growled into his ear.

“Guess I better stop then,” he murmured, his deep sexy voice full of faux innocence, with just a hint of amused skepticism. He slooowly started to slide his finger out…

I grabbed his hand. “Don’t. You. Fucking. Dare. Stop.”

“Getting mixed signals, here, little sis.” His finger resumed stroking my G-spot, while his thumb joined in by touching my clitoris. “Did you mean, ‘Don’t you fucking dare. Stop!’?”

I decided to shut up all this sassy backtalk. I slid my hand under the waistband of his shorts and underwear, and squeezed his cockhead.

His turn to smother a growl.

How the fuck was my mom oblivious to all this, even with us barely whispering to each other?

I turned my head and saw Lucus looking at me with those sexy bedroom eyes.

He leaned closer, teasing me by stopping with his lips maybe a millimeter short of mine. Forcing me to consent, if such an oxymoron makes any sense.

I felt a shock jump between the miniscule gap of our lips, like a tiny lightning bolt.

I kissed him. Softly. Then not so softly. Lucus’ tongue licked at my lips, asking for entrance.

I gave him my consent, licking back. I opened my lips, and he teased me by slowly sliding his tongue over them, like he was licking my pussy lips, and then flicking his tongue against mine, pretending it was my clit. I grabbed his hair impatiently and pressed our faces together closer, forcing his tongue to penetrate me, making him implicitly promise to give my wet pussy what it desired.

What it needed.

My heart was hammering as his tongue caressed mine. The kiss lingered, a timeless bliss as our tongues slowly caressed and teased and aroused.

I slid my hand down his strong torso, stroking and squeezing his pecs — gently pinching his nipples — then feeling up the six-pack of his abs.

When my hand reached his stiffness, squeezing it through the fabric, he oh so softly moaned and tugged at my panties.

I lifted my hips, surrendering to the moment, and let him slide my panties over my curvy brown thighs, the silk caressing my skin as Lucus pulled them down to my ankles.