Beside me Gretta rocked back and forth on her imprisoned hand and I was openly stroking my c**k through underwear that had been made literally transparent by my oozing lust. I could hear small liquid sounds issuing from between Gretta's legs and as I stroked, the lubrication soaking through the material of my underwear made small sucking sounds as my hand moved up and down. As we watched, the conversation on the TV got hotter and hotter.
His sister had resumed m**********g slowly and she asked, "Did you go back to that bathroom?"
"Every chance I got, every time you or Leigh went, I went too."
"Did you jack off there?"
"No, there wasn't any privacy, but I went on a lot of long walks, I'll bet I came five or six times a day."
"Oh" his sister murmured, rubbing faster, "that's pretty hot."
"You don't think it's stupid?"
"No, it's really nasty when you stop to think about it. What did you think about when you were off alone jacking off?"
"I thought about you and Leigh pissing mostly.
"Were we dressed or naked?"
Sometimes you were dressed and I imagined you both pissing your pants, other times you were naked and I was watching and pissing too."
"Did you imagine us pissing on you?"
Her brother was silent for a moment and then he said, "Yes, and on each other, but mostly on me or else I was holding my hand so you or Leigh could pee on it."
He had stopped stroking himself and sat with his c**k sticking up, bobbing slightly. I guess that's pretty sick, huh?"
His sister didn't say anything for a moment as she considered this and then she stopped rubbing her p***y and again pulled her swollen labia apart. She stepped so she was straddling him and said, "Did I do this?"
As Gretta and I both watched his sister began to urinate standing in front of her brother. At first a trickle that spattered between his legs and into the toilet and then growing into a forceful stream that began to bathe his inflamed c**k forcefully, battering it this way and that.
As if from a great distance I heard Gretta whimper and out of the corner of my vision saw that she had spread her legs a little and was m**********g openly, her hand moving rapidly as she teased her c**t. She saw that I was looking and flushing bright red, closed her legs again trapping the hand between them where it continued to squirm against her like a trapped animal.
All this took place in a matter of seconds because when I looked back at the TV, the sister was still pissing.
"Is this what I did?" She stood directly in front of him, a stream of hot urine arching out of her and hitting his c**k, which sprayed in a fine mist. She was pulling on her n*****s as she asked again, "Is this what you thought about me doing?"
"Oh yes, it's so hot, feels so…" You could see her body tighten as she worked to increase the force of the stream against his c**k which had become even more rigid as he moaned, "Please, you don't know what this is doing to me."
Her stream diminished and faltered for a moment and the camera zoomed in on his c**k, which had started to visibly throb. A white spurt of cream emerged from the tip and ran down the shaft and then another.
His sister said, "Do you like me doing this while you come?" and her stream returned with a vengeance. The camera zoomed out again framing them both, his sister standing over him, her urine battering his throbbing c**k. He cried out and then gasped "Oh sis, you're going to make me…." And before he could get the words out he was squirting sperm in the air, which rained down on his sister's breasts and stomach.
As soon as he began to climax, his sister resumed m**********g. As her stream diminished she rubbed madly causing her piss to splatter between her legs onto the floor as she did so. The sound of her rubbing was intensified by the amount of moisture involved and in less then five seconds she cried, "And when I finished, did I do this, did I cream my p***y right in front of you?"
Her brother, obviously in a haze of lust watched distractedly as she shuddered and came while he continued to squirt diminishing jets of come into the air.
For the last few minutes I had been utterly captivated by the story unfolding on the TV but the program switched focus back to the interview and for the first time I took notice of Gretta sitting next to me as well as my own excitement.
The first thing I noticed was the scent of arousal, which hung in the air like a fine mist. Gretta had leaned further back. The shirt had ridden up far enough so her cunt was totally exposed. She was undulating her hips back and forth slightly and I could see that her labia was every bit as red and swollen as the girl in the video. She didn't have a lot of hair on her mound and the skin around her glistening lips was slick and shone with lubrication that had leaked out as I watched. I could see her c**t standing as rigidly as my own inflamed member. She clutched the hem of the shirt in one hand and had rolled it up so that she was able to pull directly on the material that covered her breasts. Her face was flushed and looking over at me with half-lidded eyes she licked her lips and said, "I've shown you mine, are you gonna show me yours?"
I hooked my thumbs in the elastic waistband and lifting up slightly off the couch I pulled my shorts down allowing my c**k to spring free. I sat back down and kicked my shorts off my feet. Beside me I heard Gretta's sharp intake of breath and then she said, "Oh David, that's lovely."
On the screen, the video brother and sister had progressed past mutual m**********n and the sister was on her knees in front of her brother grasping his erect c**k and kissing it while her other hand remained busy between her legs.