Her painted red nails slide further over my thigh, goosebumps rising as she gets closer and closer. She smirks as I hold my breath and rests her head on my shoulder in a move that might have otherwise been interpreted as familial affection. But after the last few days, we know it's anything but platonic. The scent of my sister's perfume fills my senses, isolating the two of us in a secret sphere of rising tension. The tips of her nails graze the head of my cock through my trackpants, causing it to twitch in response.
"Feeling a little cramped?" Dad asks from the front seat without turning around.
"Sorry?" I reply, snapping out of my trance.
"You just groaned, I wasn't sure if you wanted to get out? Maybe stretch a little?"
"I wouldn't mind getting off. I haven't been stretched in a while," my sister teases.
"Well we've got a rest stop in about 10 mins. Think you can hold off?"
"No problem, we'll just distract ourselves until then," I reply, sliding my own hand over her thigh.
From the back row of the car, Hannah pipes up. "A break would be great! It sucks being cramped in the back here."
Grace giggles, squeezing the soft flesh of my thigh through my pants.
"You were the one who wanted to sit by themselves," Grace calls back to her.
Hannah doesn't reply but you can feel her rolling her eyes.
It really was her own fault. Hannah was always the lone, eldest sister. She loved her independence and was starting to feel a little claustrophobic being on a family vacation with her adult siblings. Not that Grace and I minded.
"Think you can hold out for 10 minutes?" Grace whispers in my ear, nuzzling into my neck.
"I can wait. How about yourself?"
"I can hardly wait," she purrs and grazes my cock again.
I exhale slowly at her touch and she gives a soft giggle. Grace and I have very different philosophies when it comes to travel attire. While I was in comfy clothes, trackpants and loose shirt, she was dressed for movement. I creep my fingertips up her bare thigh, lifting her short skirt higher.
Thank God for this trip. The last year had been an emotional one. Grace, the youngest, had just spent her first year out of home.
Her breath hitches as my fingertips explore more of her skin and I see her tits lift from my view down her top. Although anyone could see down her top honestly. Not only was she the smiley, bouncy, young one. But she was also blessed with a small frame and a beautiful set of breasts. She was only 5'3 but had incredibly creamy 36E cups that she flaunted constantly.
Her fingertips crawl higher up my thigh until she's clutching my cock through the trackpants.
"Fuuuuuuck," I whisper quietly, my body reacting, lifting my hips involuntarily as my cock flexes.
"I don't think you can wait either," Grace whispers, giggling.
When she left home, she was actually quite shy. But as she went through her first year of uni, you could see the change happening as she made visits home.
The shirts got a little higher each time, and the necklines dipped further. I can remember getting my first taboo erection when she visited over winter. I never knew life could happen in slow motion until Grace took her sweater off.
I obsessed over the Instagram photos she posted from Spring Break. And now here we are, on holidays for the Summer.
With her hand on my cock. Her thumb rubbing the head of my dick.
"Two minutes!" Dad calls from the front.
I moan quietly, desperately wishing for the break to be further away.
I can feel her smirking against my neck as she unties the string of my trackpants and slides her delicate fingers beneath the waistband.
