"Well, our penis is still hard," Jenny-cock said. ""What are we waiting for?" Jeff took his cue, and the couple started fucking Jenny-fleshlight again.
Between her moans, Jenny-cock was asking Jeff for to go faster, and harder, just as she had asked previous times. This time, Jeff said, "I want to stretch this out more this time." Jenny-cock felt a little frustrated, but also agreed, as Jenny-fleshlight's pussies were feeling great arousal, especially the one closest to Jeff's torso.
"OK, flip me around! But be quick about it!" Jeff pulled Jenny-fleshlight off their shared cock, and even as it continued its contractions, quickly flipped it around and shoved themself back in. Jenny's moans intensified. After another minute, Jeff no longer could restrain himself. He sped up stroking Jenny-fleshlight up and down their cock, faster and faster, until they came simultaneously. "My being both cock and cunt makes it so easy to synchronize cumming as both!"
After he caught his breath, he asked, "Want to transform after a third time?"
Jenny thought it over. "This is so incredible that I'd be happy to keep it up for a long time. But it still would be fun to try other experiences, and since we could do this again any time, sure, go ahead and ejaculate me out this time."
Jeff typed the the instruction into the Chronivac, and started jacking off with Jenny-fleshlight again. This time he did as she asked, and pounded as fast and as hard as he could. "I'm amazed that you don't have a sore pussy! My dick is getting sore!"
"OUR disk is getting a bit sore, yes," she replied, "but this still feels incredible."
When they orgasmed, once again many enormous spurts of Jenny-cum shot through the lengthy penis, all the way through Jenny-fleshlight, and onto the floor. He watched it start to swirl. But unlike before, his dick didn't shrink back to normal. As Jenny-cum reconstituted into Jenny-human, Jenny-fleshlight merged into his cock.
When Jenny at last opened her eyes, smiling, she immediately spotted Jeff's still-enormous cock. "Decided to keep the size, huh?" she ribbed him, "I guess you'll have to Chronivac my pussy bigger if we want to fuck with this body."
"Already ahead of you" he replied, pushing her down onto the bed, and starting to penetrate her.
"Ooh!" She exclaimed, "I'm _still_ your cock, too? Mind blown!"
They proceeded to have the closest thing to normal sex they'd had, at least by outward appearance. Jeff said, "I love all of your transforms, but I miss your limbs, breasts, and mouth, with most of the transforms. I remember when we started you said you wanted it to be extra special, and it certainly has been, but your normal body is wonderful too!"