You and your sister head to campus

You both hop in your car and start driving. Your nerves are spiking up but Amanda seems nonchalant, her legs up on the dashboard singing along to the music. You glance at her legs and notice they look smooth, she must have shaved them this morning.

The drive is relatively short so you take a second to remind her of the rules or laws or whatever before you're actually on the campus grounds. She sighs and tells you she's not an idiot and that she remembers. Once on campus you focus on the road, there are several crossings for students and you don't want to hit anyone. At the first crossing you slow down and that's when you both see several nude girls with just backpacks on walking across the street.

"Holy shit!" Amanda pulls her legs back from the dashboard and leans forward. "You were fucking serious!"

"Right? This is fucking nuts, I knew I wasn't crazy!" you hit the wheel in triumph. Triumph of what, you're not certain, but you feel like it's progress.

"Well, it's not that crazy if you think about it..." Amanda kind of trails off. You don't know what she means but the students clear and you continue driving, pulling into the parking lot on cloud nine.

Getting out of the car you absentmindedly start talking to her, "So I'll show you around, like do a proper campus tour, but also show you how absurd things are around here. We can stop by for some coffee, know we both need some of that, but there's always some guy jacking off somewhere in there...."

You trail off as you notice she's not besides you. You look around for your sister Amanda and notice she's still by the car. She bends down and you shout to get her attention.

She stands back up and says, "Hold up, geez, hold your horses." As she takes a step to the side, you see her bare pussy! She's bottomless. She had stepped out of her shorts and panties, now holding them in her hand, and places them on the hood of your car. Before you can say anything she's lifting off her shirt and bra in one smooth motion. Her tits are small yet perky. Your dick doesn't care about family ties and the hormones flooding your body don't either. You never imagined your little sister would shave her pussy but there it stands before you, almost begging to be touched. She snaps her fingers to bring you back to reality, "Hey my pervert of a brother, unlock the car so I can toss my clothes inside!"