Cock Viper
Sheila slowly stepped backwards toward the couch against the wall taking Tracy's hands. The young woman, still entranced, stood and followed. Sheila sat back on the couch guiding the blonde down between her legs. Tracy began exploring the folds of the strange woman's sex.
Jon stepped up beside the two women, his long cock growing. "This is far to stimulating for me to just watch." He stepped up so that his stiff pole was right beside the transsexual woman's face. "You are free to have her too, but I think I'll handle the duties until you understand what's all involved."
Sheila lay back on the couch and began sucking on Jon's cock. He in turn kneaded her dark round breasts playing with her hard nipples. Between her legs Tracy was eating her pussy.
"You can't tell me that she's anything other than a beautiful woman. I can clearly see that from here." Rick said.
"Sheila will alter her bias to reflect the sex of her partners. In this case she will be able to accommodate both of us." He paused to stroke his organ, feeding into Sheila's eager mouth. "She also exudes large quantities of pheromone, ten times you or me, a hundred times a regular human. She is intrinsically a female but as you'll see she can couple effectively as a male."
Rick was dimly aware of Laura holding him close, sliding her wet lips against his rock hard cock. Obviously affected by the powerful pheromone, Laura stared at the threesome on the couch.
Tracy leaned forward to bury her face between Sheila's hard legs. A deep hiss came from Sheila as she sucked air in response. Tracy spread Sheila's already moist lips to reveal a deep pink slit crowned by a large clitoris.
Jon narrated the action. "Watch what happens when Tracy as really begins to arouse Sheila. She responds strongest to the sex of her partner of the moment." Tracy began to rub her thumb on Sheila's clit, slowly sliding first one, then two fingers into her pussy. The transsexual legs began to quiver and her pelvis began to undulate as she made deep groans in her throat.
Rick and Laura had a good view as Tracy bent down to Sheila's pussy and began to flick her clit with her tongue. The effect on the other woman was dramatic. Sheila tensed; her entire body went rigid. Her hands slid down her torso to spread her pussy lips wide. Tracy rubbed furiously up and down over Sheila's pubic mound. Pressing hard, she worked the clit between her fingers. To Rick's surprise, the clit appeared to grow. Tracy's hands began to concentrate hard on the growing nub, which was slick with Sheila's juices. An animal groan issued from the transsexual as her swollen clitoris suddenly slid out from its nesting place. Unsheathed from her clitoral hood was a small penis. Its slim head was light pink that very quickly blended into a dark shaft. Fascinated, Tracy slid her fingers up and down the organ, making it longer. Sheila's hips began to grind slowly in time to the touch. Tracy took it into her mouth, working it with her tongue. Rick watched in fascination as Tracy worked her head up and down, each time exposing more of Sheila's cock.
After a few minutes Tracy was sucking on almost a foot of dark cock. Tracy kept on sucking the end of the cock while she guided one of the transsexual's hands down to its pussy. Sheila slowly slid two of her fingers in, her other hand pumping Jon's cock into her mouth. Tracy played with her own clit while leaning to lick the small hood above the base of Sheila's cock. Tracy stroked the cock gently, Sheila's stomach muscles jerked, tensing with each movement. Sheila stared at Tracy's hand moving along her cock, closing her eyes as each new wave of pleasure engulfed her.
"Her cock and her clitoris are really the same organ." Jon explained to Rick "She is at the complete mercy of the stimulation and has really no control over herself at this point. She will likely only stop when she is exhausted."
"Does that thing ever get hard?" Laura asked noticing how the cock stayed slightly pliable.
"It does. It's somewhat prehensile and she can control the size of it to accommodate her partner. It can be a firm foot and a half or a rock hard 10 inches. She has some control over its motion too. It moves, bends and curves inside another vagina and as a bonus, she can have multiple orgasms, just like any woman."
Tracy looked up at the fat cock in Sheila's mouth. Slowly she stood up. Straddling Sheila, she made sure that the transsexual's long cock was still hanging between her legs like a pole, bouncing with her heartbeat. As long as it was hanging down there, she was safe. Straddling the dark haired creature she joined in sucking on Jon's hard cock. Alternately Sheila would take it in her mouth and suck then pass it over to Tracy to do the same. Often the two would meet in a passionate kiss with Jon's cock head in the middle.
While both women were engaged Sheila's long cock began to stir. Rick and Laura watched in amazement as it slowly began twisting upward, much like a snake raising its head. It was possible to see the organ thickening and pulling as it climbed toward the young blonde's pussy. Poised just below Tracy the cock looked like a viper ready to strike. It had shortened and thickened significantly, there was an ooze of clear fluid emanating from the cock head and drooling down her shaft.
Ever so gently it touched Tracy's tight slit. Unconsciously, the blonde began to press against the pink head. Sheila whimpered, her hips thrust as the end of her long organ undulated, entering Tracy's waiting pussy. Shocked and confused Tracy turned to look at Rick as Sheila's organ began to twist and squirm itself a few inches into her. Unable to speak Tracy could only gasp as the transsexual's cock slid in. With two-thirds of the strange cock in her Tracy began to moan and rock her hips as she clung to Sheila. Below her, Sheila began to match her movements, her cock twisting from side to side.
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