" What the hell do you think I've been doing for the past half an hour." I cried as I heard a click from the door.Almost wetting myself I pushed the d...oor open and rushed over to the toilet, the relief I felt when my pee jetted into the bowl was almost sexual and I gave a deep sigh of relief as my bladder stopped complaining."You really did need to go!" my sister laughed from behind me.Mary was two years older than me and as big sister's go I was forced to admit that she wasn't bad, but she did. Much like the vibrator in my butt made me orgasm in a different way than my pussy, his thrusting cock was growing my feelings. He was creating an orgasm in me.I moaned."Yes, Brittany," he responded immediately. "Enjoy. Enjoy." Oooooh!" I let out. He was ... he really was going to fuck my butt to orgasm. "Ohhh!"My butt squeezed around his cock then returned to a more relaxed state. He continued to fuck me but faster now. His cock slipped completely out of me and then ... and then it went right. Annie had finished gathering her books, placing them with exact precision into their specific location within her bag. Even though she couldn't see Jeff's face, she knew, or was willing to bet her apartment on it, that the older man was scoping out her well formed, rounded ass. Putting her arms through the straps of the back pack on at a time, she gave any leering eyes one final wiggle of her backside before turning around to walk out the room. She didn't get very far though. As she walked only. " I pushed her back slightly and stepped towards the closet. I pulled out a new play toy, a bondage swing, and showed it to her. She looked at it, not realizing what the straps would form. I reached up and grabbed the chain hanging from the ceiling and connected the swivel ring from the swing to it. Diane continued to look quizzically at the new toy that hung like straps. I took her hand and clasped the binding from the swing around her left hand. "No. Please. I'll be good," she playfully.