The camera work on this was really good. It showed her unbuttoning her blouse with shaky fingers and letting it slip off her shoulders while she worked with the buttons on the side of her skirt. As the skirt dropped down her legs, she reached behind to undo the clasp on her bra and then roughly shoved her pantyhose and underwear off, kicking them to one side.
At once she turned to face a full-length mirror on the wall and started to hurriedly stimulate her c******s with one hand while alternately slapping her flaming red p***y with the other.
My own c**k had returned to rigid attention, standing totally erect straining the fabric of my underwear. I glanced over at Gretta who was sitting right next to me. She was squeezing her legs together and had resumed pulling on the hem of her shirt. Her n*****s were clearly visible and her breathing was quite ragged. I leaned back, bringing my c**k to even more noticeable prominence. I saw Gretta glance at it but we were both pretty engrossed in what was happening on the screen.
On the screen, the sister was furiously m**********g in front of a mirror, alternately slapping then stroking a bright red p***y that shone with lubrication. Behind her, the door to the bathroom opened and her brother entered. He stood motionless, his rigid member standing our like a tree branch as he watched his sister.
Beside me I heard Gretta stifle a gasp and then she moved. I looked over and saw that Gretta had also leaned back on the couch, pulling her arms back and resting them behind her head. This had the effect of pulling her shirt up to the point where her cunt was nearly exposed. She had maybe an inch of shirt covering her. Her eyes were fixed on the screen, but I know she was aware that I was looking at her. I know she wanted me to be looking at her. As I kept one eye on Gretta and one eye on the screen, Gretta, her eyes fixed firmly on mine reached down and slipped one hand between her legs, trapping it there and squeezing it with her thighs. Our eyes still locked together, I gently grasped the towering bulge of my erection at the tip and gave it a gentle squeeze, shuddering as I did so. We returned our attention to the TV as we continued caressing ourselves.
On the screen, the brother had moved around and was sitting on the toilet watching his sister as she continued to tease her c**t and slap her swollen labia. His hand moved up and down his slippery shaft with lazy assurance.
"Like what you see?" she gasped, looking over at him.
"Very much."
She rubbed herself intently for a minute or so and then she asked, "What's the nastiest thing you've ever done?"
"You'll think it's stupid", he said.
"Please" she gasped, "It'll make me hotter, maybe I can tall you something too."
"Promise you won't laugh."
She abruptly stopped rubbing and turned to face him. Reaching down, she parted her swollen lips and said, "Can you see hot excited I am?"
"Yes."
"Can you see my c******s now?"
"Yes."
"See how it's sticking up, just like your c**k is?"
"Yes."
"I promise I won't laugh."
"OK, last summer when we went camping, you know you brought your girlfriend Leigh along?"
"Yeah, I remember."
"Well there was this bathroom we all used with a big tank under it and I could see and hear women on the other side. I mean I couldn't really see them, but I could hear them talking and when they went I could see their pee hit the water underneath."
"OK, I remember that bathroom."
"Once, when you and Leigh were on the other side, I listened to you both talking and I saw you both pee, or I should say I saw your streams hit the water. I don't know why but it made me so horny I spent most of the rest of the trip jacking off every chance I got."