Maybe it was because I was a bit too horny for my own good, but one evening, while my sister was off with her boyfriend, I invited one of her closest friends, Mary, over to hang out. We played cards for a bit, and since it wasn't too cold out, we figured we'd go for a walk to the beach not too far from my house.
Initially avoiding the topic of our mutual attraction to each other, it took only a few minutes of making out to get Mary down onto the beach. As we rolled around in the sand, Mary quickly ripped off her shirt, and helped me to unhook her bra. Alternating between her lips and her nipples, it didn't take long for Mary to get me to shift my attention elsewhere. Soon my shirt was off, and she motioned for me to take off her pants, which I soon did; only then did she ask me to strip down, naked.
Now butt naked, Mary and I wrapped ourselves around each other, my fingers now inside her wet, shaven pussy, finger fucking her faster and faster. It didn't take long for her to cum, and quite loudly at that. By the time she pushed me onto of her, she was still wet and moaning. Her turn over, Mary began beating me off on her bare chest. It didn't take long for me to help her out, this being her first time, and soon enough I shot my load all over her chest. The balmy early fall night engulfing us, Mary and I lay naked together, wrapped around each other, and covered in cum, for the next few minutes, before slowly getting up and dressing.