Michael Smith - Siblings

I hadn't thought about it in advance, but since I was almost leaning against the back of the front seat, it seemed easier to lie on my back and let Marianne get on top. I thought for a moment that it might leave her feeling too exposed to the rest of the world, but in her present state of mind she would probably have gone out for popcorn naked.

So I slid down onto my back and watched my cock go rigidly vertical; I was already imagining what Marianne's cunt would feel like. I loved Alex unreservedly, but this was a matter of pure lust. She knelt between my legs and let her long hair curtain my groin as she took my cock in her mouth once more. She was a fast learner, but she didn't try to deep-throat me either.

"Enough, enough!" I said, and reached for her arms to draw her up to me. She smiled and moved up to straddle my hips. Reaching between her legs, she opened her cunt and guided herself carefully onto my waiting cock. That was a detail I enjoyed: Instead of grasping my penis and steering it into her, she accepted it as a target and impaled herself on it. The difference was minor and the result was the same, but it was*nice*… almost a compliment.

Her lips parted and her eyes closed as she settled herself. I held onto her flanks as she moved up and down slowly and experimentally. I moved then to her swaying breasts and covered them with my hands, squeezing them slowly in rhythm with her own movements. I tugged forward and she opened her eyes and bent from the waist, resting her open hands on my shoulders. Now my cock was rubbing strongly against her clit and her eyes had gone smokey. Her tits were pressed against my collarbone and I nibbled at her neck and the underside of her chin, and squeezed her ass. As I picked up the tempo, she rasped "Oh, God…"

Bill and Alex had moved on to the next stage as well. Both had shed the remainder of their clothes and Alex was on her back on the blanket beside me, only a few inches away. She was filled by his cock and thoroughly enjoying it. Her long legs were wrapped around his waist and her head was arched back.

She raised her hips to meet each thrust – a maneuver I knew well – and sucked in between her teeth at each stroke. Bill looked completely transported by Alex's aggressive sexuality; I knew exactly what he was feeling at that moment and I was pleased for both of them. Bill was to my sister what Marianne was to me: An enthusiastic and capable sex partner, and heretofore casual friend, who would be a much closer friend after tonight.

Neither of them was a threat to either of us and this change of bodies was exciting and exhilarating. Alex had been more accurate about our need for variety than even she had realized.

I unconsciously matched my rhythm to Bill's and soon Alex and I were lifting our lower bodies almost in tandem in our pursuit of orgasm. I felt it building in me and so did Marianne; she was making little moaning sounds and her face was almost agonized with abandon. Without really paying attention, I knew Bill was approaching his climax as well. His eyes were shut as tightly as Marianne's as his sensory input concentrated in his cock.

Unexpectedly, Alex's hand crossed the few inches between our bodies and touched my leg. I took her hand and she twined her fingers between mine and squeezed. I glanced sideways and found her smiling crookedly at me with sparks in her eyes.

I knew immediately what she intended and I laughed silently with her. For the next minute we held hands and squeezed in unison. And we gradually slid our bodies together until our shoulders were just touching. Alex even planted one foot lightly against Marianne's hip and Marianne grasped Alex's kneecap to brace her wild gyrations. Neither of our partners were aware that we were holding hands, of course, but it was like a telepathic link.

My cock was about to explode and Marianne's cunt got the message; my orgasm triggered hers and we tipped over the edge together. Bill could not have been unaware of what was happening next to him, especially when Marianne tried unsuccessful to smother an ecstatic squeal. Bill came ten seconds after I did, and he was followed instantly by my sister's arching climax. She squeezed my hand until my knuckles were white.

It was close to an indescribable experience. Alex and I, each fucking other people, but also sharing our separate orgasms as if we were fucking each other – a doubled climax. Bill shooting off inside Alex while I fountained into Marianne's steaming vagina, and Alex and I coming together as well, which intensified the experience for both of us. It was almost an out-of-the-body feeling.

Our four overheated bodies slumped in a heap for several minutes while everyone gasped for breath. It finally occurred to me that this must be a very strange situation for Bill and Marianne.

It certainly wasn't the first time two couples had foregone privacy in favor of fucking space, especially at the drive-in, but this was a little different. A brother and sister, pressed side by side, naked, in the back of a car, banging away with their dates. Nobody had exactly planned it that way, and on another occasion it might have struck our companions as extremely weird, but the enthusiastic lust all four of us felt had overcome any inhibitions.

But it was in the back of my mind – and Alex's, I was sure – that we still had to be very careful how we behaved toward each other. I wanted very badly to lean over and kiss Alex, but that wouldn't do at all. It would have betrayed The Secret. But as we began slowly to untangle ourselves, I managed to stroke Alex's short ribs for an instant, and she surreptitiously caressed the back of my calf.

Nor, surprisingly, was there no great rush by anyone to cover themselves as the sexual fog began to dissipate. We laughed and make bawdy puns as we casually sorted out our clothing. I glanced quickly at Bills's cock out of male curiosity; it had shrunk considerably, of course, but it was still longer and somewhat bigger around than mine. I made a mental note to ask Alex whether or not his size had really made a difference in how her cunt felt.

Alex had worn black bikini panties under her black mini and Marianne had opted for blazing red under her shorts – though I hadn't noticed at the time, I was so anxious to get her out of them.

Alex held up the red satin panties and said "Wow!" in mock awe. "Marianne, I like these! How about a swap?"

Marianne actually blushed a little – after all that had just happened! – and laughed. She shook out the very brief black lace panties and raised her eyebrows.

"Are you sure, Alex? These are much sexier!" More expensive, too, probably, I thought, but I was reading my sister's mind again. Each girl slipped on the other's panties and they knelt facing each other for a moment, comparing the results.

Alex reached out and minutely adjusted the pair Marianne was wearing. "Hey, those look nice on you; you look good in black!"

Bill and I exchanged glances as we avidly watched the girls. We were both thinking what a turn-on it was, knowing each girl's crotch was cradled in the spot where the other's had been a short while before. And both pairs were "used," which made Alex's apparent whim even more erotic. But I already knew that this was a little gift from Alex to me. She wouldn't be wearing Marianne's underwear for very long.

The movie had another five or ten minutes to run when Marianne and I climbed back into the front seat while Bill and Alex reconstructed the back seat. Marianne picked up her bra, wadded in into a ball, and stuffed it down into the very bottom of her purse. Then she went back to her earlier position, straddling my lap, with her arms around my neck and her nose nuzzling my ear. I stroked her thighs and gave her an affectionate hug. We might do this again, or it might be something we could only do once, but I could live with that too. Either way, I knew Marianne and I would always be more than just Journalism office buddies. She was sweet, sexy, pretty, and smart. Just the kind of close friend I wanted. By choice, I didn't have many.