We didn’t inform mom as we didn’t want to ruin her vacation. Whenever I had to pee james would take me to the toilet. James and I were naked as we...thought it was easier and we were alone aswell. James proposed that while I had plaster I should be sleeping with him. James and I after having dinner got into bed naked. The blanket was small so we had to cuddle. And then we slept. Late night around 4 am I got up and found james cut cock erected. Oh my god it was around the size of my arm. It was. We had done risky sex before, but her sister was right there. And it wasn't like we had a blanket to hide under. I was kind-of nervous... I mean, one word of something like this to my girlfriend's parents and I probably would never be welcome in their house again... but my girlfriend started slowly working my pre-cum around the head of my cock and all care went out the window... I looked at my girlfriend and she was staring right into my eyes with this mischievous smile as she slowly worked her. I held up as much, shoot a little precum into her. Britt held my body tighter, her legs grabbed my hips so tight that I had no choice but to cum. I shoot my load into her pussy, shoving it in as far as I could go. Soon as I finished, Britt kissed my lips, biting down on it. “wow, that was amazing” she said, but I replied to hang for a second. It took me a few seconds, and I was back to thrusting in her pussy. Britt responded with “more, really, omg don't stop”. I fucked her pussy hard, wanting. I got in the car and we drove of to a little car park next to a park to do more reversing and 3 point turns.I had lowered the zip on the top of my dress so that it was open to between my tits. I could see that the dress had ridden up and that my pussy, I like to call it my cunt when I am about to do something naughty, was only just about covered. Anyway, in twisting right around my dress had opened and I could tell that my cunt was on display, the twisting motion also caused my legs to open a.