On a road trip with my parents and little brother but there's only one open seat in the back because the rest has to be used for storage.

Naturally, my little brother gets to sit on my lap. I'm bigger, after all, and I refused the idea to sit in his lap when our parents teased. Besides, he seemed more than content to be close to me. I couldn't help but secretly feel the same.

Being this close, I could smell the sweet scent of his body wash and shampoo. I could see his adams apple bob with every swallow. I could breathe and his hair would sway with it. We were so close I couldn't help but stare, my eyes locked on him.

I felt him squirm on my lap an hour or so in, him trying to get more comfortable on the long road trip. I couldn't help but let out a quiet groan, hoping he couldn't hear as he shifted his weight and grinded against my clothed dick. I started to instantly harden, as I cursed myself for not being able to control it.

He kept squirming however, and I could barely take it. I gripped his hips to stop him from moving. "Stop squirming." I couldn't help but growl lowly into his ear.

I couldn't see his face, but I could feel his breath hitch. When I looked over his shoulder at his lap, I saw that he was getting hard as well.

Looking in the front, I could see our mother was asleep in the passenger seat and my father didn't seem to be paying attention. Taking a gamble, not being able to think clearly enough to make any rational decisions, I slowly grinded up into my brother's ass.

I could feel him push against me, moving his hips down against mine. In order to stop my own noises, I bit down on his neck, making him gasp for air out loud. I made sure to keep an eye up front, checking every so often to make sure our dad hadn't noticed.

I wrapped my hand around his waist, pulling him as close as possible. My hand slipped under the band of his pants as I rubbed his hard cock through his boxers with long strokes. He immediately clasped his hands over his mouth to stop the moans as I continued to palm him. Some spilled out however, and I kept glancing in the front seat to make sure no one suspected, and it seemed like we were in the clear still.

After a few minutes of silent gasping and sucking noises, palming him through his boxers and him grinding his ass against my dick, we both came in our boxers. Not realizing that we weren't being as quiet as we thought we were, but too caught up in our own lust to notice.

Minutes later, still panting and trying to collect ourselves, it finally sunk in. Did I really just cum from my brother grinding on me? Did I really just jerk my little brother off?

As guilty as I felt, I also couldn't help but look at the hickey placed on my brother's neck and feel an insatiable hunger for more.