The Car Ride

About an hour had passed, I was sitting on my bed, scrolling through my phone when I hear Natalie call my name.

"Rebecca, you ready to go?!" She shouts from downstairs.

"I'll be right there!" I shout back in response and stand up, grabbing the bags I packed with Lizzie and heading downstairs.

By the time I had gotten downstairs Natalie was already outside, waiting by the car. I take my bags out and put them into the back of the car before getting in.

Natalie made sure everything was good before getting into the drivers seat. "All good to go?" She asked, Lizzie running outside just as she said it.

"I'm coming too!" Lizzie said and got into the back with me.

"Okay now we're good to go then." Natalie said and started to drive.

A while into the drive I could feel my cock starting to get hard, I wasn't sure if it was the thought of what happened with Lizzie earlier or something else but it was quickly growing in my shorts and would soon create a very visible bulge.

Lizzie soon notices the bulge and gives me a seductive look. "Looks like you need a hand." She whispered to me as she placed a hand on my thigh.

I gave her a slight nod. "Yes but Nat-"

Before I could finish speaking, Lizzie had already freed my cock and wrapped her hand around it.

"She won't notice, as long as you're quiet anyway." Lizzie said as she started to slowly stroke my length, paying extra attention to my sensitive tip.

I moaned softly at the feeling, Lizzie started to stroke slightly faster which made me bite my lip in an attempt to supress my moans.

Lizzie smirks as her hand begins stroking my length even faster, I try my hardest to stop myself from moaning but can't helping letting one escape my lips. As soon as I notice I quickly cover my mouth with my hand, using it to surpress my moans as I enjoy the feeling of my sister's soft hand against my throbbing cock.

She switches between stroking fast and slow, I keep biting my lip as I moan against my hand, the moans getting louder as I felt myself reaching the edge. "I'm so close." I mumble to Lizzie but she nods, seeming to understand me.

"Well we don't want to make a mess of Nat's car." She whispers, using one hand to keep slowly stroking while using the other to slide down her jeans and panties. She then grabs her pink panties and wraps them around my cock, stroking as fast as she could until I gasp and cum into her panties.

Lizzie smiles and pulls her jeans back up, shoving the cum covered panties into her back pocket. "Glad I could help out sis."

The rest of the car ride is pretty uneventful and we soon arrive at the campus, it's a large, old and fancy looking building, definitely a 'prestigous institution' as it likes to call itself.