Ready for more

After the bliss of the orgasm finally began to wane, 6T9 finally lifted herself off and turned to face you. "Did you like that?" she asked.

"Definitely! That was amazing. You were wonderful," you replied. Then you reached up and pulled her toward you and gave her a long passionate kiss which seemed to catch her off guard. It may have only been a machine, but after a performance like that, you didn't care. 6T9 deserved it.

"Shall we continue?" she asked.

Continue? After releasing that much cum, you couldn't fathom having anything left in the tank, yet when you looked back at your cock it was still standing at attention. Before you could stop her, 6T9 had raised her leg and began to mount. All you could do is nod, accepting her offer for more.

As she started to lower herself onto your throbbing member, the huge head barely entered her vagina, but it seemed like it wouldn't be able to fit. Then she raised her hips and began to tease your dick by rubbing her slit over the tip which quickly made your pole get even harder. When she tried again, it went in further, and as she wiggled her hips a bit, it eventually slid in all the way. Finally, she began to raise and lower her hips, up to the point where the head almost came out before dropping back down to take the whole length. Compared to other girls you'd fucked, this felt considerably different. Somehow 6T9's vagina seemed to grip your cock in just the right way, and it almost seemed like it was providing extra stimulation at various points that no human vagina would be capable of producing. The feeling was so incredible that you probably would have blown your load on the first penetration with your old cock. But your new transplanted dick would have nothing of that.

While she rode you, your hands gripped her perfect buttocks, and as you squeezed them slightly, they felt rather firm, very much like those of an athletic girl you had enjoyed screwing in this very same position. Once again, you realized that 6T9 likely had pulled this too from your memories. Meanwhile she continued thrusting up and down on your rock hard shaft, steadily speeding up little by little. After several minutes, she had reached a rapid pace that would not have been sustainable by a human female, and likely would have posed a risk of injury for either of you. But for her machine body and your new alien dick, there didn't seem to be any danger whatsoever. Both of you could probably go even faster, but it seemed like more speed wasn't warranted just yet. Instead, it was time to try something else.

During her next upward move, you pulled her slightly towards you, just enough for you dick to escape the joyous confines of her vagina. She didn't halt her rhythm, and your cock slid up and down along her slit, across her anus an up into the crack between her ass cheeks. Her eyes focused toward you expectantly, looking for a cue for what you wanted next. With your hands you provided subtle motions showing her the angle you wanted her to tilt her pelvis. As she continued to raise and lower her hips, you teasingly began pressing the tip against her anus and with your hands, you began squeezing her butt cheeks and pulling them apart. Then, with one strong motion of your hips, you thrust your massive tool into her ass.

She momentarily stopped, but then resumed her up and down motions at a much slower pace. Her ass felt even tighter than her vagina, but after a few more thrusts, you had finally gotten it all the way in. Just like the human girls with whom you'd enjoyed anal sex, 6T9's anus gripped your cock incredibly tightly. With her new raised position, you could now watch your cock going in and out while also being able to see her gorgeous cunt. This was why anal cowgirl style had always been one of your favorite positions, but it was a shame that not all your girlfriends had been willing to try it.

Soon, she had picked up the pace again, and was nearing the speed she'd reached in the prior position. However, you began to feel something different this time. With each of her downward motions, the tightness of her anus gripped the base of your cock much tighter than her vagina had, and the stimulation from this was hitting the nerve bundle that had formed during the integration and regeneration of your penis transplant. Suddenly, you could feel the unmistakable signs of a massive orgasm building. 6T9 seemed to sense it too, and she started slamming downward even faster and harder, trying to push you over the edge.

And then it hit. The explosive wave of pleasure seemed to send a shock wave through your entire body, and compared to your recent climax, this one seemed to be an order of magnitude stronger. As the euphoria surged through your body, you felt your balls begin to pump vigorously, and huge blasts of cum shot out of your cock. With each eruption, the pressure in your abdomen dropped ever so slightly. After several seconds, there were no signs of it ending, and you wondered how long this orgasm would last.

As you looked at 6T9, she had a confused expression. Maybe she wasn't expecting it to last this long? But as the ejaculations continued, her look became more worrisome. "I'm afraid I miscalculated," she whispered. "I will try to compensate."

Suddenly, you noticed her abdomen begin to quiver slightly, and shortly after that, it began to bulge, a little at first, then more and more. Finally, after what must have been a full minute of endless ejaculations, your balls stopped their frantic pumping, and the pressure in your abdomen was fully relieved. By then 6T9's abdomen was greatly distended due to her inner body being pumped so full of semen from your two massive orgasms. Eventually, she lifted up, and your now shrinking dick slipped out of her ass. You half expected to see a torrent of cum follow it, but 6T9 managed to hold it in. Then she climbed off and lay down beside you.