It was the middle of June and I was on vacation from university. My older brother had recently moved to a flat several hours away from our parents' house, and while he was busy setting up the basic things he needed to live there, Mom volunteered to transport some of what he had packed.
Obviously, when she volunteered herself, she also volunteered me and Dad, since she couldn't load and unload everything to and from the car alone.
So after spending 3 hours loading the family car with what seemed to be an infinite amount of boxes and somehow making them fit inside, the three of us stood there staring at the car with our hands on our hips.
"Well, I'm driving," Mom said, breaking the minute-long silence.
"Can you even drive like this?" Dad asked, pointing at the right side of the car, which was more box than car, "Doesn't look safe..."
He was right, it didn't look safe at all. The only spots that didn't have a box were the driver's seat, the passenger seat behind it, and the space between the driver and the windshield. Even the rear-view mirror was useless, as it showed only the wide box that we had set up horizontally behind the two front headrests. The driver could only see what was in front of them and what was to their left.
"Don't worry, I'll drive carefully," she replied, having sat down on the driver's seat.
Dad approached the passenger seat and moved some boxes further in, then sighed and looked at me. I rolled my eyes.
"We can't sit side by side, can we?" I asked.
"No," he replied.
"One of us will have to sit on the other's lap."
"Yep."
"For several hours."
"That's right. And you know who that is."
Well, my dad was taller, wider, heavier, and would likely crush me if he sat on my lap. I, on the other hand, was like Mom, tiny. While he had muscles everywhere, Mom and I were lean and focused more on our butts.
Dad often showed his appreciation for Mom's assets by grabbing, groping and slapping them. I even caught him looking at my butt when I wore some skin-tight clothing or bent over on purpose.
So, the question of who would sit on whose lap was easily answered.
Dad entered the car, sat down, and adjusted the boxes so he could be more comfortable. When he was done, I squeezed myself into the car and sat on his lap. After we were all ready, Mom put some music on and started driving.
Over the next few minutes, the weirdest part was where to place our hands. I ended up just laying mine on my lap, but because of the boxes to our right, Dad had to place his right hand on top of my right thigh.
As the trip continued, he rubbed my thigh and sometimes squeezed it.
Soon we got to a bumpy part of the road, and this is where things went sideways. Every time the car hit a bump, it went up and down, and so did I. Dad's big frame meant he barely moved, but I started moving around too much.
When I almost hit the ceiling of the car with my head, Dad put his left arm around my waist so he could hold me down. I thought this would be enough, but since he couldn't completely stop me from moving, I ended up slightly bouncing up and down on his lap.
After a while, I started to feel something hard beneath my butt and my eyes widened when I figured out what it was. My dad was hard! His cock was getting harder as I bounced up and down. And what I felt was big!
Now... I would be lying if I said I hadn't imagined him naked or thought about what he was packing.
Dad was attractive, muscular, and the walls of our house weren't thick enough to muffle the sounds of my parents having sex. Which they did very frequently. So I often masturbated while listening to them, fantasizing that he was fucking me instead of my mom.
But now? Now I was bouncing on top of my dad's quickly hardening cock while my mom drove the car. And suddenly, all the toys I had used as a substitute seemed... small.
All of this made my own cock quickly grow to full mast. The problem? I was wearing some very loose shorts, so I had a very visible tent. Every time I moved, my cock would touch the arm Dad had around my waist. Bouncing on his cock and being touched felt good. Really good.
I lost myself in the feeling and the bouncing, and my imagination ran loose. The sounds I masturbated to and the thought of my dad grabbing my butt cheeks flooded my mind.
Suddenly, Mom's loud voice brought me back to reality, and I noticed the car was no longer hitting any bumps. We were now on the highway.
"Sorry about that, boys!" she shouted over the music. "Are you okay?"
"All good here, honey! We just need to adjust our position," Dad replied, seemingly calm. "Can you move forward a bit, son?"
I was still a bit dazed, but I did as he asked and leaned forward, rising up from his lap. Then I heard Dad adjust something, and he pulled me back down to his lap. His cock was gone. I couldn't feel it beneath me anymore, so that must have been what he had adjusted.
The thought that he wanted to avoid having me on his cock made me sad, but then I slid backwards and felt my butt hit something. Something BIG. He had moved his cock from next to his leg, and it was now pointing up, leaning against his body.
