"I don't want to be a girl!" screamed Billy in his new womanly voice.
"This is an unfortunate situation but I don't know what to do," explained the shop keeper. "Perhaps you should have listened to me before gulping down that bottle of transgender serum!"
Stan, reacting quickly, snatched the large jar of satyr cream out of the shop keeper's hand, and grabbed Billy and ran from the store back out to the truck. Stan threw Billy and the bottle of satyr cream in the backseat, then jumped in the front and sped off.
"Stupid shop keeper, and his stupid serum turned me into a girl... And what's worse, it may be permanent!" cried Billy.
"I have an idea Billy," said Stan, "Use that jar of satyr cream, and it may make you a male again!"
Stan and Billy stopped at the pasture halfway to Amy and Sarah's house, and got out of truck and beside a few hay bails, Billy unscrewed the jar of satyr cream. She began to feel her pussy getting wet with excitement, anticipating the changes to come. Taking a glob of it in her hand Billy rubbed the white cream into her breasts, down her stomach, then slipped her fingers down into her pussy and started to massage herself. Tremendous pressure started to build in Billy's chest and she rubbed her breasts with her free hand as they began to rapidly increase in size.
What were once smaller DD's were now massive, basketball-sized HH's. She felt a sudden sharp pleasure as huge black nipples erected from their ends. A break in her transformation allowed Billy to caress her huge tits, tweaking the hard, long nipples. She cupped them in her hands and looked down to marvel at their size as she felt something tickle her neck. She touched her chin, only to find that a long, dark, goatee had grown in.