As I sat in the driver's seat of our cramped car, the summer sun beating down on us, I couldn't help but roll my eyes at my little sister's complaints. She was squirming in the passenger seat, her long legs cramped up against the dashboard.
"Ugh, can you please stop driving like a maniac?" she whined, rubbing her sore knees. "We're going to be at the beach soon, just tough it out."
I chuckled, "Come on, sis. It's all part of the adventure. You've got to learn to roll with the punches."
As if to prove my point, the car hit a bump in the road and my sister's leg jolted forward, pressing firmly against my crotch. I felt a sudden jolt of my own, a warmth spreading through my bathing suit bottoms.
My sister's eyes went wide as she felt me stiffen beneath her touch. "Oh my god, I'm so sorry!" she stammered, trying to pull her leg away.
But the bumps in the road continued, and I couldn't help but notice the way her leg kept brushing against me. The friction was driving me wild, and I could feel myself growing harder by the second.
My sister's face turned bright red as she realized what was happening. "Oh my god, is that...is that your-"
"It's just the way we're sitting," I cut her off, trying to play it cool. But I could see the curiosity in her eyes, the way she kept glancing down at my growing bulge.
I couldn't help but feel a little thrill at her reaction. I'd never seen my little sister look so flustered before. And as much as she tried to ignore it, I could see the way she kept shifting in her seat, her own arousal growing.
The car hit another bump and I couldn't help but groan as I felt her twat grinding against me. She yelped, trying to pull away, but there was nowhere for her to go.
"Stop being a pervert!" she hissed, her face turning even redder. But I could see the way her breath was coming faster, the way her chest was rising and falling.
"I can't help it," I told her, my voice low and husky. "It's just natural."
My sister's eyes went wide as she realized what I was implying. "Oh my god, you can't be serious," she stammered.
But I could see the way she was looking at me, the way her body was reacting to mine. And I knew that she was curious, that she wanted to know what it felt like.
"You're missing out," I told her, my voice low and seductive. "You should give it a try."
"Shut up!" she gasped, trying to hide her own arousal. But I could see the way she was biting her lip, the way her eyes were filled with desire.
I grinned, knowing that I had her hooked. "You know you want to," I whispered, my hand reaching out to rest on her thigh.
She shivered at my touch, her resistance crumbling. "Fine," she breathed, her voice barely above a whisper. "But just this once."
I couldn't help but laugh, feeling triumphant. "Of course, sis. Whatever you say."
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