But Katie wasn't satisfied yet with the sex they had and said "We can talk about it later. I can see that all of you have penises and seem to be liking them a lot. I want to have one too." then she turned to Anna and asked her "How did you do to onle the pussies on your breasts turn into cocks?"
"I'ts better if I show you." Anna said and went to a shelf, she opened a drawer and took out a disposable syringe, so she got one vial, took a little of the potion with if and applied in her original pussy. In a short time, Anna's pussy changed into a 7inch erect penis and a sack with golf ball sized testicles. "See, it's easy."
After seeing Anna's example, Katie took another disposable syringe, filled it and applied in her middle pussy.
Anna noticed that not onle the syringe Katie took was bigger than the one she used, Katie had filled it completely while Anna had used just 10% of the amount the small syringe could take.
"You shouldn't use so much of the potion." Anna said, but it was already too late, Katie had already applied everything there.
Shortly, Katie's cock and balls replaced her middle pussy. It was already completely hard at 8inch and and it didn't look like it was going to stop growing soon, her balls growing to match it. It reached a complete foot, 2 feet, 4 feet, until it finally stopped.
At the end Katie's cock was a huge 20 feet hard monster. It was so wide that her arms barelly met around it. Her balls were big enough for her to sit on then.
Katie tried too stroke her cock, but it was too big for her alone. "Please, help me, I can't do it alone." Katie asked
Anna hugged Katie's cock and began rubbing herself against it. Later Tiff and the three Akis joined to help in Katie's masturbation.
They continued with this for about ten minutes when Katie finally came.
Katie's orgasm was shooting so much cum that the basement was flooding.
When Katie stopped cumming, there was a pool of cum in the basement that covered them until their chests. She only said "Sorry Anna, I made a mess in your basement." and fell asleep.