UfFFMMM...don't stop! Don't stop! FUCK MMMMMM!"Sara's tongue traced ampersands across her friend's engorged clit (a trade secret that her college room...ate had taught her during an unexpected game of Truth or Dare) and as she did that her fingers massaged the area that she knew would make her friend orgasm the fastest. With her other hand, she was able to get a middle digit slid up into Kristy's butt and soon the orgasm was starting.Sara felt Kristy jerk on top of her and then there was an. We are both fucking each other faster now that she wants my cum in her. Her moans become shaky quick breaths. I can feel her thighs quiver. Her arms begin to tremble. The curve in her lower back becomes deeper as her ass cheeks stick even higher in the air, now almost vibrating. I know she is now ready too."Lets cum together!" I manage to say in a shaky voice, sounding more like a grunt."Yes!" still looking back to me, she tries to muffle her shriek since we are fucking right under Ms.. "he disagrees" she says with a wink. "it's OK we all do it. Why can't we share the fun?" she asks dropping her towel. This is the first time Mark has ever seen his sister fully naked and can't take his eyes of her glistening pussy. Perfectly shaven with swollen pink lips. "no touching each other just let us play together?" she hints inquisitively before placing one hand on her boobs tweaking her erect nipples and the other sliding down to tease her clit. Mark watches for a while before grabbing. She wasn't even shy about sharing her body online, most of her Twitter account was nude selfies, she had a pornhub account which was much of the same as well as a few risky videos. She knew she had a kink for being seen, an exhibitionist...or was it something along the lines of almost being caught? Both of her accounts weren't using her real name, her face wasn't visible either...and she certainly wanted to push those limits she's kept herself in, maybe even to the public...She shook her head.