Betty was a scientist, very beautiful and intelligent, but she was different from other women because between her legs there was an 11 inch dick and balls the size of oranges. She didn't think this would be a problem at first, but she was bullied a lot after she told others and when classmates from other schools found out. When she reached adolescence her dick, which was no bigger than any boy's, started to grow and she started to get erections, which made it practically impossible to hide, so she decided it wouldn't do to keep changing schools, however she decided that she would get revenge on everyone who had bullied her. Being different took her away from people and few dared to become close to her, no man ever wanted to have any relationship with her and almost all the girls despised her, calling her a freak, making her start to believe with time. that society was too rotten to accept someone else, which made it change its target for the whole society. Now she was a scientist who had her own laboratory that worked on the study of the human genome, however secretly she had a secret laboratory where she was doing her own experiments for her revenge.
She finally managed to produce a substance she wanted so badly, one that would turn anyone she came in contact with into a futa. The substance created was a totally colorless and odorless gas that would affect everyone who breathed it, which she herself was immune because she was already born a futa.
Bethy was ready for the last test, she was near a closed glass chamber where Sarah, an assistant and accomplice of her, was there naked.
****
-flashback-
Sarah met Betty when they started working together on their first job and, before long, she learned of a male member between the scientist's legs. Unlike the people I had met before, Sarah did everything to get closer to Betty, who insisted on keeping her distance, but due to her insistence, one day she lost her patience.
"Leave me alone. You're gonna want to humiliate me too just because I've got a dick, aren't you? I won't put up with this." Betty said
"And why would i do that? I think you have such a big dick even though you're such a pretty girl is amazing." Sarah said
"What? Ahh!! Thanks. Nobody ever told me something like that." Betty said
"No need to say that, I just wish we could become friends. Of course if you want me to be your girlfriend I wouldn't think so bad." Sarah said
After this dialogue they became great friends, and after a few months Sarah told Betty that deep down she was jealous, that she wanted to have her own dick.
With that Betty told Sarah about her plan and her motivations for it, what the woman liked and decided to help.
*****
-present-
"I'm ready Betty, you can flush the chamber with the gas." Sarah said
"Remember this is your last chance. I have not created any antidote and there will be a way to go back later." Betty said
"I won't regret it, since you told me I could have a real cock between my legs I've been looking forward to this moment." Sarah said
"OK, so there you go. If this test is successful we are ready to start the plan." Betty said and opened the passage for the gas to fill the glass chamber.
After the chamber was taken by gas Sarah started to show signs that she was getting con tedious, her pussy got so wet that liquid ran from her. "I think it's working, I feel something happening to my clit. It's pulsing." she said
The experiment was working, what looked like Sarah's clit grew, taking some skin with it and quickly forming a 2-inch cock and tiny ballsack, with marble-sized testicles that formed at its base. Her new member kept pulsing, getting bigger with each pulse it gave.
Betty got horny watching her assistant transform, lifted her skirt, stuck her hard cock out and started jacking off.
When the growth stopped Sarah slowly caught her new member saying "Finally, I finally have a dick, and a real dick." and started stroking her dick that was about the same size as Betty's.
Betty approached the glass chamber, where she was jacking off in front of her assistant, who reciprocated and did the same by turning to her.
Soon Sarah came for the first time with her cock, her first cum gushing towards Betty, being stopped by the glass that separated them. Soon the scientist did the same and soiled the same glass from the outside.
With the end of the orgasm Betty opened the glass chamber with a smile, saying "The test was successful. Now we can launch the gas in strategic places and turn people into sex-crazed futas."