My name is John and I'd like to tell you a story about how my sister Emily and I became intimately close during our freshman year of college. We had both just turn 18. Growing up we did everything together. We are twins after all. We went to the same schools, played in band together, did some sports together, we have always just been very close. We didn't even think about going to different colleges, we just assumed that we would go the same one together.
The year was about to start and we were on our way with our parents. Our dad loaded up our suburban with all our stuff. He had only left a small area in the back of the suburban for us to sit. I'm not sure how he thought it was enough room but after this trip I'm glad he did. Emily got in the suburban first and I noticed how perfect her little round butt was. She was wearing a skirt because she thought it was more comfortable for road trips. I couldn't help myself I slapped her little round ass as she was climbing in and said "hurry up weirdo!"
She turned around and half glared half smirked at me and said "shut up! I'll go as fast as I want." She got situated in the back after climbing over our stuff and I followed her back there. As I turned to sit down I noticed how little room there was and when I sat down I pulled her skirt up a little ways revealing her white panties. She squeaked and said "Hey watch it!"
I looked at her and said sorry as she was pulling her skirt back down. We got situated in the back of the suburban and started on our trip. After a few miles Emily kept trying to get comfortable but her side was being poked by my hockey stick. She looked at me and said.
"Hey I can't get comfortable back here. Could I just sit on your lap for a little bit?"
"Sure" I said not really thinking anything of it. We spent a lot of time close to each other. She sat on my lap a lot and we hugged each other all the time. Being physical was just part of our relationship.
She stood part way up and lifted her leg over me so she could sit on my lap. She sat down with her perfect ass nestled right on top of my crotch. I put my hands around her tummy like we usually did and finally both of us were comfortable.
After a few miles I started to dose off thinking about college and the future. Emily I could tell was getting sleepy too as she had leaned back against me laying her head back on my shoulder. As we were falling asleep together my dad hit a bump in the road waking both of us up.
"Sorry kids!" he called back to us. Neither of our parents could see us because of all the crap we had jammed into the suburban.
"We're fine." Emily called back. "Just falling asleep"
It was then that I noticed I had a half chub from waking back up. I usually get boners when I wake up it's just how my body works. I also noticed Emily's breasts sticking out of her low cut shirt. She had leaned her head back against me and I had a wonderful view of her perfect large breasts. Emily is a small girl but I've always thought she had larger breasts for her size. She had that hour glass figure girls want.
I'll admit I stared down her shirt for longer than any brother should but the blood in my dick was taking control of my brain. I felt Emily wriggle her ass against my now hardening dick and said "Is that your phone or are you just excited to see me?" laughing as she just assumed it was my phone.
"Actually sis I am a bit excited." I said blushing to myself. At this point Emily had already figured out it wasn't a phone she was wriggling her ass against and stopped moving.
"Oh" she said leaning forward and looking back at me. "What's up?" she said in a quieter voice so our parents couldn't hear.
"Ah well when dad hit that bump it woke me up and you know how I always get boners when I wake up" I whispered back to her.
"I can definitely tell now." She said giggling. At this point I was fully hard with my dick resting in between her butt checks.
"Also when you lean back I can see all the way down your shirt and no guy can resist getting a bit excited at that." I said laughing.
She smiled and blushed a little at that. Then my dad had to move off the side of the road and hit the tracks they use to wake truckers up when they drift off the road. this caused the car to shake up and down for a few seconds causing my dick to rub in between her cheeks even more. Then he hit another larger bump causing Emily to bounce in my lap and my dick fell forward far enough that when she came back down it drug across her pussy through her thin panties nestling in between the lips of her vagina.
When she landed back down my hands grabbed her hips off reflex and she fell back against me revealing her wonderful breasts again.
"Shit sis sorry" I said half groaning because it felt so good.
"That's ok" She said still leaning back against me. "that did feel pretty good actually." She whispered back to me.
