I read a story about 1 guy who developes a female muscle growth potion and then this girl takes it and grows. She then shares it with her friend who also becomes muscular and they look the guy in a basement and make him call is smart girl friend and when she comes to see him. The 2 muscular girls force her to drink the potion and then she become one of the muscle girls. Can you tell me the name and the author of this story thanks.