You opened a box and are greeted by a truly bizarre sight. Instead of a dick, you saw a glistening purple tentacle. The weird appendage writhed as if it had a mind of its own. Was this thing even a genital?
"Oooooh," Natalie said. She pulled down her panties to fondle her hardening dick, the head beginning to poke out of the foreskin. "Look what the newcomer likes, Eboni. It's the ovipositor!"
"Sweet!" Eboni grinned, her meaty dick tenting her panties as it stiffened.
"The... ovipositor?" you ask.
"You've got great taste, Ruby," said Natalie. "It's an alien queen's genital you use to lay eggs in a girl's pussy. I'd wanted it for myself when I first joined, but... I sorta chickened out. You see, choosing an inhuman dick (or dick equivalent, in your case) will cause changes in the rest of your body. You'd need to make a conscious effort to change fully, but you will acquire some characteristics of an alien."
You pondered a little but became even more firm in your decision. "My decision remains the same; this is going to be my dick." you pulled down your pants and your panties and placed the base of the dildo against the skin of your crotch, but nothing happened.
Eboni laughed a little and said "That's not how you install a dick. Come with us to the club room, there we have everything you need to install your new ovipositor."
You put your pants and panties back on and were guided to the Futanari Club room. The room was relatively large and had a simple square table in the middle that was apparently used for club activity planning meetings. There was also a bed, this one at least three times the size of a normal king, probably not made to sleep in, but to be able to have orgies on top of it. There was a 65 inch TV on one wall and a library next to it that contained magazines, books, movies and games, all with pornographic content and almost all containing futanari. There was also a sewing machine in the corner, which Eboni explained was because they overreached themselves a few times and ended up tearing their clothes, so it was cheaper for them to be able to fix them themselves.
"Now all you have to do is install your dick," Natalie said. "What you did earlier wasn't entirely wrong, but just touching the spot isn't enough. Take off your clothes and choose a comfortable place for yourself."
You undressed and sat on the edge of the bed, putting the alien ovipositor on your crotch again, and again nothing happened.
"You've only taken the first step," Natalie explained. "Now you need to hold the dick in place with one hand and stroke it slowly, as if it were already part of your body. As you chose an alien's ovipositor, you will acquire some characteristics of an alien, but don't worry, the changes will not be enough for you to stop being considered human... more or less."
You nodded and held the ovipositor to your pussy and begin to stroke it. As you did, Eboni got down on her knees and began to play with Natalie's exposed dick. She flicked the foreskin on and off of the tip, finally peeling it all the way back and beginning to suck on the exposed dickhead.
You continued to stroke your exotic dildo as you watched Eboni give Natalie her blowjob. Suddenly, you felt something. It was very weak at that moment, but you were sure you could feel the ovipositor being touched by your hand, and so you knew it was already merging with you.
The ovipositor that, despite its realistic appearance, was made of silicone, began to change. You felt that at the touch it felt more and more that it was made of flesh and blood, and at the same time getting hotter. At the same time, your eyes turned into insectoid compound eyes, and your skin turned the same glistening purple as the ovipositor. It occurred to you that you were beginning to secrete mucus like a frog. Your tongue also elongated into something gecko-like.
You kept stroking the ovipositor, which was growing more and more fused with you, becoming more and more sensitive to the touch. You were still trying to get used to the new view from your compound eyes. Your ovipositor had already become real enough to produce precum, which ran down its length, lubricating it.
Eboni's throat was bulging with Natalie's throbbing dick. Natalie suddenly gasped as her orgasm hit her, and her dick pumped massive gobs of cum down Eboni's throat. At the same time, Eboni's dick shot a shower of jizz into the air, even though no one had touched the black girl's cock; she was just that aroused!
Your transformation completed, and you felt what had to be an orgasm coming. A pressure built up in the base of your ovipositor that moved upward, squeezing through your dicklike member. A jellylike green sphere the size of a marble suddenly shot from the tip of your ovipositor, followed by another, another, and another. Soon, a small pile of about ten of these things that looked like fish roe lay at your purple feet. These must be your eggs!
"Cool!" Natalie chirped excitedly as she pulled her softening cock out of Eboni's mouth. "You just laid your first clutch of eggs! Too bad they'll die without a host to carry them. At least they'll taste great spread on toast."
"You'll want to lay some properly, though," said Eboni. She and Natalie both waggled their dicks suggestively at you before turning around and bending over.
"Come on, Ruby," Natalie said pleadingly. "Which of us gets to be an alien mommy first?"