I was stuck in the back 3rd row seat of our family SUV, watching videos on my phone of myself and my girlfriend having sex. My parents were in the front, and the middle of the car was piled high with suitcases, ice boxes, and junk for the trip. My twin sister, Kirsten, was asleep on a pillow, leaning against the window. I was horny as fuck and slowly rubbing my dick through my shorts.
We were moving across the country in the middle of summer, and my sister and I had left behind a boyfriend and girlfriend. My girlfriend and I had been having sex 3 or 4 times a day, mostly oral and quick fucking. She was a true nympho. Everything turned her on and she had endless, juicy orgasms. We fucked, sucked, and fingered almost non-stop for 2 months, and now it was over. I was a junkie without a fix, with a 9-inch cock as hard as steel, and nothing to do but watch videos of my girlfriend, and try not to cum. I needed to cum, but I would somehow have to get rid of a lot of evidence, because I cum like a porn star. I couldn’t cum in my shorts without making a huge mess.