My parents and I went on a 2 week family vacation one summer.  When we go on our long trips, we would take my mom's wood panel station wagon.  We could easily pack our camping gear, coolers in the car and give me space to kill time in the back. I usually read books, listened to my walkman or just stare out the window at the landscape.  Back in the 70's seatbelts were more of a recomendation and I remember sitting in the very back many times and hung out.  

We would put our coolers and suitcases in the back seat and I would usually make soime sore of sitting space with our sleeping bags and pillows etc... in the very back.  Basically, I made myself comfortable for the long trips.  This particular trip required us to drive a very long distance ( about 6-8 hours) before we would stop to camp.  My dad would map out the trip on a foldable map and tell us how long we had to go and where.  With this information, I would prepare my space with snacks and drinks and anything I needed.  

Like usual, we left for our trip very early in the morning.  We packed the night before so we could just get in and go when we woke up.  On trips like this, I would just wear my pajamas and slippers and take my stuffed bear for the morning ride.  That morning, it was very warm and sunny.  I climbed into the back of the station wagon through the back window and made myself comfortable with the rolled up sleeping bags and pillows and fell to sleep.  After a couple hours, I woke up and asked where we were and how long we have been on the road.  The windows were all down and the warm air cooled us as it frantically blew through the car.  

It was becoming hotter as the morning passed so I rolled up my pajama bottoms and kicked off my slippers.  I sat with my back propped up with some sleeping bags along the back seat and to my parents.  As usual on trips like this, boredom set in and I was becomming hotter and annoyed.  I asked if we could stop at a rest area so I could change into my shorts and shirt.  My dad replied that we were no where near a rest area.  I told them I was sweating and wanted to change my clothes.  My mom replied to just lay low and change right there in the back.  "it's no big deal", she said.  My dad told me to grab some ice from the cooler.  

I grabbed a couple ice cubes from our cooler and sucked on them and put them on my neck.

The warm air was melting the ice quickly and my shirt and blankets were getting wet.  It was refreshing but messy.  I placed the ice cubes in a cup and used that to cool me off.  I rolled up my shirt to expose my belly and slid the cup of ice over my warm skin.  It was better than nothing.  I laid back down facing the back of the car and there was no cars behind us on the 2 lane road.  Glancing over my shoulder to see my parents, my mom was reading and dad driving.  

I daringly rolled my shirt up over my little breasts to expose them to the warm air and laid back.  I took the cup of ice and slide it over my belly as the condensation ran to the waist of my PJ's.   The cool water followed the center valley that was made from my stomache muscles. I was a small skinny fit farm girl.  Feeling my little perky nipples out in the moving air was exciting.  I took an ice cube from the cup and held it over my left nipple.  I waited for the drip to hit my erect nipple and it was erotic.  Again, I glanced over to see my parents preoccupied so I continued to play with the ice on and around my titties.  

After a couple of ice cubes, my pajama bottoms were wet around the elastic waist with the cool water.   I was becoming very excited and horny from my ice play.  So, still facing the back, there were no cars close so I lifted my hips a bit and slid my bottoms down to barely expose my pubic mound.  My hairs were matted down from the wet cloth so I took my fingers and fluffed them up to feel the wind in the car.  I laid back and watched the wind blow the exposed pubes around and fluffing them up.  

Now, I felt the urge to get more daring.  I slid my pants down below my crotch to completely free my lower bush from the warmth of my pajamas to the blowing air.  I took an ice cube and returned my attention to my perky pink nipples and let the ice melt and run down my belly and into my fluffy mound.  I kept my legs closed as the water pooled up in my furry groin.  Then, I leaned forward to remove my bottoms and the cool water ran over my hot pussy.  It was refreshing.  Again, checking in on my parents, I felt comfortable in my space.  I spread my feet a little and laid back and let the moment sink in.  

 As I sat back, I laid in the back of the car and let the warm air massage my body and blow my bush in every direction.  I was very satisfied in the moment and we were just cruising along.  

I told my mom that I was going to change into my swim suit and she thought it was a good idea.  My suit was in a small bag I packed and I grabbed it.  Now, I have an excuse if they wonder why I'm naked.  I removed my top laying down and just laid there.  I was numb to the moment and loved being naked.  I knew that if we were going to stop, my dad always said something and that would give me time to get dressed.  I could hear other cars passing by in the opposite direction and I slowly ran my hands over my body and took in the warm morning.   I positoned myself so I could atleast see out the windows, especially the back window.  There was a car beind us but not close as we went on our way.  

I bent my knees to plant my feet so the bottom of my bare feet were agianst each other and my thighs fell open.  The wind immediately found it's way over my open groin.  Taking my hands, I ran them over my titties and down my sweaty body and over my young pussy.  I could feel my vulva swelling and beciming tingly.  Oblivious to where we were, I took my fingers on my right hand and slid them over my mound to my clit.  I softly stroked it up and down a few times to arouse myself even more.  Going further into my crotch, I used my finger tip to feel my canal.  I parted my hair and slid my precum up over my moist pussy and up to my clit.  When I could feel the slippery cum allowing my fingers to glide over my clit, I knew I was going to cum.   I slowly played with my young meaty pussy as I lay in the back of the car.  I continued to pleasure myself and was in no rush to cum.  As I faced the back window, I noticed that we were turning onto an entrance ramp for another road.  

As we rounded the ramp clockwise, my makeshift bed slid over to the side.  As I sat up to adjust myself, cars were passing us on the drivers side as we started to gain speed again.  I noticed a semi truck approaching from behind us and changing lanes to pass us.  As the truck came along side of us, I covered myself with my pajamas.  

The traffic was all traveling together and I wanted to continue to play.  I opened my thighs with my clothes covering me and softly massaged my throbbing clit.   We were surrounded by cars as I was starting so spasm from my orgasm.  My knees slammed together and open a few times while my body was releasing an intense orgasm.  My breathing was heavy and jerky and I was squirming with pleasure while my parents were sitting in the front seat.  

My hot body was sweating and the wind was still blowing crazy through the windows of the car.  As I calmed down, I laid straight face up and watched traffic pass us on the driver side.  I could see vehicles approaching so I could be prepared for whatever came.  As I laid there naked, I covered my face a bit and watched the traffic.  My exposed teen body was laying in the back of the car while cars where everywhere.  Then, I saw that my dad changed lanes to allow for cars for an upcoming ramp.  as we sped by, a semi truck was entering our traffic.  As we drove past him, I could easily see the driver as we passed him by.   When he gained speed, he was a couple cars behind us.  

I sneakily kept my eye on traffic and enjoyed my nudist moment.  AS my dad passed a pick up truck, the truck was next to us for a bit and I could eventually see the cab of the truck. I covered my face as we passed the truck and I saw him looking at us as we very slowly passed.  I had no idea what anyone could see when driving but I know he saw in our open back passenger window while I was calmly laying on display.  I thought I was being sneaky and that we wold just pass the pick up by but when we were next to him, he kept pace with us and eagerly was looking at me nude in the car.  I could tell that he was caught completely off guard and sped up to keep his eyes on my throbbing body.  I laid still as I wathced him through the shirt and I was very turned on by my voyeur.  

 My dad sped up to get back in the right lane and the truck went behind us.  I lost view since I was laying vey low then I heard him accelerate and come up on the driver side but stayed by the back window.  Again, I laid still as he tried to position himself for a better view but his angle was not good.  As a semi truck came up behind him, he moved behind us and allowed the semi to pass.  Again, I laid still as the wind pushed my light blonde bush everywhere.  I could see the semi truck as it approached and was about to pass then kept pace.  He could see me flashing my young body as he kept pace.  

The semi put on his blinker to get in the lane behind us and the pick up backed off.  When the semi positioned himself behind us, he kept a close enough distance that he coud see my naked body but not my face.  As we cruised down the highway with hours of driving left, I took full advantage of the moment.  I opened my legs and kept them flat on the car.  I tried to position myself to see the driver's face as I could see that he was very focused on his exhibitionsit subject.  He remained behind us for a very long time.  I laid in the back of the car spread eagle as my "victim" took in my naked body.  I loved the fact that a stranger was wathcing my lay naked and innocent and I was safe.  

I could feel my body increasing in tempurature and my heart rate was fast and throbbing.  I was really enjoying the moment and I know I opened up a new adventure for myself.  As we raced down the highway, my dad called out to me and asked if I needed to use the restroom since there was a rest area approaching in a few miles.  I said "yes" and searched for my bikini.  I tried to keep my face hidden and struggled to get my bottoms on while exposing my sloppy vagina.  I lifted my hairypelvis for my voyeur and slid my bikini bottoms on.  Then, I had to sit up a bit to get my top under me so I could tie it in the front and spin it around.  I tied the back knot then spun the top around to allow me to tie it behind my neck.  I felt the fabric brush against my erect pink nipples and they were very hard.  I positioned my top to tie it and I was done.  We turned into a rest area and the semi followed us.  My heart jumped as I didn't think he would.  As we slowed to enter, the semi went to a designeted area for semi trucks and we parked in the front.  

I climbed out the back window of the station wagon and placed my bare feet on the hot concrete.  I quickly jogged to the grass as my parents were waiting for me.  as I alked to them, I looked for the semi truck as it was parking.  I felt like my parents knew something was up but they didn't say anything except asking about the ride so far.  Walking in my bikini in the hot sun, I felt sweat running down my belly and looked down to see that I had my bottoms on inside out.  My pussy was bulging and throbbing as I walked with them.  I said, oh my god, I'm embarrassed and was going to go back to the car to change them around.  

They went inside the building and I went back to the car. As I was opening the hatch downward so I could climb into the car, I noticed the pick up truck park right next to us on our passenger side.  I sat on the hatch as the driver kept looking.  I watched traffic zoom by on the highway behind our cars.  I stood up and slid my bottoms past my small skinny but and quickly dropped them and switched them to inside right.  With no cars coming into the rest area,and my parents no where in sight, I stood up and faced the passing traffic to expose my bush.  I sat on the hatch and sprad my legs to bring a foot up to place it in my bikini.  Once my foot was in, I set my heal on the hatch to expose my swollen vulva and labia to the warm wind and traffic.  I brought up my right foot and slid my foot into the bikini.   I then stood up on the hot concrete and slowly pulled up my bikini bottoms.  I turned to close the hatch and saw my parents standing in front of a map on sight.  I walked quickly toward them and told them I was going to go to the bathroom.  

I went inside the busy bathroom and the stall doors and walls were very low.  I went pee and wiped myself of the pee and cum from my orgasmic trip.  I wanted so bad to masturbate but there was no privacy.  Very horny, I washed my hands and face and exited the building.  I watched as the voyeur in the pick up truck walked toward me.  I eagerly pulled my bottoms up on the sides to expose my swollen camel toe.  I was excited as he stared at my crotch the whole way and I passed by him and went back to the car.  I made myself comfortable in the back as my parents came back and got into the car.  As we exited the rest area, I was already bottomless and eager to flash and masturbate some more for the rest of the trip.