Does a body good

Jennifer turned to the bar and called the attendant.
"A glass of milk, please?"
The barhop, a teenage boy only a little younger than them, turned red and hurried away. He came back quickly with a glass of milk and handed it to her.
"Um, its on the house."
"Thanks!" Jennifer chimed before chugging the whole thing in on gulp. "I can feel 'em growing already!"
Wallace laughed and commented he could never find a bra his size.
Sarah had another idea.
Clutching the rock again, she said "I wish that when any girl drinks milk from this bar, her boobs grow a cup size."
Jennifer had ordered her drink before the wish, so she was unaffected.
"And I also wish that any boy that drinks the milk here starts turning into an extremely sexy female version of themself."
The rock warmed up in her hand.
Out of the corner of her eye, she noticed a 21 year old college student taking a slurp of a milkshake. He licked his lips and took in a few more spoonfuls, unaware as his previously muscular chest was filling out into a pair of A-cup breasts. A few more bites and he now had a full B cup. His body was beginning to resemble an hourglass shape.
She passed next to David and placed her hand on his free cheek.
"Come on, let's get something to drink."