The Milking Experiment (Unabridged‪)‬

Marie was a student and, like most students, she had no money and didn't know how she was going to survive another term. Browsing through the student magazine, she saw an advert offering thousands of pounds for suitable young women to submit to medical trials. Little did she know that the ad had been placed by an uber-rich and super-intelligent scientist, Dr. Andrew Felton, who had dedicated his life to making his ultimate perversion come true. He was creating human dairy cows. And Marie would be one of the first.

Extract:

"All of a sudden, Marie's milk came in and her head nearly exploded with the sensation. She watched in amazement as the pipes filled with white fluid and she felt every fluid ounce pass through her nipples. "There we go!" said Sally, as she left her to it."