Brother Sister Story I
Thank you to Oldbroad76 for editing.
"Okay, long drive today," My Mum said as I put a third suitcase into my car. "How long do you think you can go without stopping?"
"I can go for hours," I replied. "It's Grace who will need to stop to pee every 5 minutes!"
"Shut up!" Grace shouted from the front door of our house.
"You two better not be arguing the entire drive there, or we will swap who's in which car!" Our Mum sighed.
"Yes, Mum." Grace and I replied in unison.
My car was filled with suitcases while our Mum and Dad's was filled with food. We were all set for our family weeklong holiday. We were driving to the other side of the country, but it was a drive I was not looking forward to.
Grace opened the passenger side of my car, as she stepped in, and I couldn't help but gaze at her shapely arse hidden by her tight, blue jean shorts.
"Right, see you later." I said to my Mum as I got into the driver's side.
"Ready?" Grace asked.
"Yep, let's go." I replied.
--
We were an hour into our road trip.
On the motorway my Mum and Dad had sped off, given that their car was much nicer than mine.
In my car was me driving and my sister, Grace, in the passenger seat. I was 20, and Grace was 18, and we were as close as most brothers and sisters were. She was nice, if a little annoying and more wild than me. However, it was impossible to not notice how Grace had come into her body since turning 18.
She had long blonde hair that shined like the sun, and although she had a slim frame, her chest had become more and more noticeable as of late, especially as she was wearing a loose white vest that blew in the wind, revealing her white lacy bra underneath.
Occasionally I would look across the car and see underneath her vest and get a glance at her cleavage. Yes, it was wrong that I would look at my younger sister like that, but she was hot!
She was sat on her knees, wearing blue denim shorts that stopped very high up her thighs. Grace's legs weren't long, but they were toned and smooth, the sort of legs that forced you to stare at them.
More than once on the drive, I accidentally swerved across a lane as I got distracted by her.
"I'm so bored!" Grace moaned, her blonde hair blowing back due to her open window.
"Well, there's another three days of driving, so get used to it." I told her.
I didn't expect this drive to be fun, but being in such close quarters with my sister, whom I was massively attracted to, was making it even harder. With each glance over I panicked that she would catch and ridicule me.
That was until her hand suddenly reached across and took a handful of my crotch.
"Wooah!" I shouted and swerved the car. "What are you doing?!" I shouted, getting the car back between the lanes.
"You've been staring at me since we got in the car," Grace told me. "I was seeing if you were hard."
Her fingers remained gripped around my growing cock, blocked by my jeans.
With my eyes on the road, I had a quick look down, and Grace's fingers were tightening and loosening around my cock that was getting harder and harder.
"You alright there?" I asked sarcastically.
Her hand moved away, and I immediately regretted saying anything.
"Not as good as you are apparently." Grace joked.
Her window slowly rose up until it closed, but I didn't realise how silent the car was without the window open and the air blowing in.
Grace pulled her hair back behind her head and stretched, her chest pushing up in front of her, and I couldn't help but look over.
"You're so easy to tease." Grace laughed out.
"You're the one practically shoving your tits in your brother's face." I joked back.
"You'd like that, wouldn't you," Grace said with a half smile. "Your sister shoving her tits in your face."
I glanced at her again to see a cocky grin before looking back on the road.
"I wouldn't say no." I replied, smiling at myself.
"Perv." Grace joked.
The car went deathly quiet after that. We had always been comfortable with each other, but something felt different now, as though we had crossed a line and didn't know how to act.
"Fine." Grace sighed.
My head turned to the side and back to the front constantly as Grace sat forward.
"What are you doing?" I asked, seeing my younger sister moving in the corner of my eye.
"What you asked for." Grace replied back, and the seriousness in her voice both frightened and excited me.
Still trying to watch, Grace grabbed the hem of her loose vest and effortlessly pulled it over her head before throwing it to the floor by her feet.
My cock jumped as my sister sat next to me in her bra. I cursed the fact that I had to focus on the road, wishing I could properly look at her cleavage.
That was until I noticed her bra being pulled forward. One of Grace's arms straightened, and I saw her bra drop on top of her vest.
I quickly turned my head, and I saw them. It was just a glance, but Grace's bare chest was out. They were glorious! Even with only quick looks, I could see their perfect shape and size.
"Are they real?" I asked since they looked too perfectly positioned to be real.
Two silky smooth spheres were attached to her chest, bouncing slightly with each movement. The weight of them made them fall down only slightly, but age was on her side. Perfectly placed were her stiff nipples, and her areolae were large and soft to look at.
"Yes, they're real!" Grace shouted and slapped my arm.
In the corner of my eye, I could see them bounce, and what I would've done to reach across and take her globes into my hands.
Instead, I had to settle for watching Grace's tanned fingers hold onto them. Her fleshy breast pushed between each of her fingers, her stiff nipple poking through a gap as she pulled on them.
"You know people can see in, right?" I said, noticing plenty of other cars on the motorway.
"Aww, are you shy?" Grace mocked, the little tease!
"Oh, I'm not shy," I told her. "I just didn't realise what a slut my sister was."
"A slut now, am I?" Grace argued. "Well, if I'm a slut, then I'd better be a good slut."
I could see her playing with her big tits next to me, pulling at her firm, pale nipples. My cock was now at full attention in my jeans, desperate to be freed.
"Would a slut finger herself in a car while sitting next to her brother?" Grace then asked me.
My mouth instantly filled with saliva. Was she being serious? She had always been jokey and sarcastic, but I really couldn't tell.
"Oh, I guess not." Grace then said when I didn't reply, knocking some sense into me.
"Actually," I replied and saw a smirk on the side of my sister's face, "a real slut would take all her clothes off before fingering herself, so anyone driving past could see."
