so the 2 doctors want to experiment on her so they start to feed her sperm enhancers to make her cum more and more often, but once they realize thats not the only thing growing, her dick everytime she cums grows bigger and bigger, and once her dick gets so huge it wont fit in there mouths the girl starts fucking her dick blocking all the cum backwards so her balls get bigger and bigger and bigger, when she pulls out her balls look like basketballs so they get her to cum and cum and cum , and when she does her dick keeps growing and they keep repeating the process until her dick looks like a 10 foot long 2 feet wide hose

Very erotic.