"What are you doing?" you demanded, even though you guessed the answer.
"Exactly what you're thinking of" Jess said in a faux sweet voice. "We should see a change in another couple of seconds."
Horrified, you went for the panties, only to double over in pain. "Shit. What is happening?" you swore.
"Language, miss. Proper girls don't swear" Sarah giggled in faux outrage. "But if you have to know, externally, you're completely female. Least in the crotch."
"Yeah. Welcome to girlhood, miss. Hope you enjoy" Jess added, obviously enjoying herself at your expense. You weren't so gleeful; instead you was at your breaking point.
"If you admit this is a weird, sick prank, I may...." you hissed, as you doubled over once more. You felt a strange wiggling sensation, something that the two witches noticed. They actually started naming the part they assumed (correctly) was being grown, which made you even angrier. "Enough!" you yelled.
"Not very lady-like, is she?" Jess mocked. "We better get her bra on."
"No, leave it off and let the magic reduce her to a little girl. We can wait" Sarah countered.
Angered, you took a step towards the two witches when the door shattered into dozens of pieces. Two more teenaged witches marched in, followed by your grandmother! She immediately started barking orders, clearly in charge. "Susan. Rachel. Take these two troubled witches away. I'll deal with them later for a gross violation of rules and protocol once I've dealt with Mr Harrison."
The two witches that came in with your grandmother nodded, and took the two troublemakers away, both seemingly frozen with terror. Once alone. your grandmother turned to you, looking slightly embarrassed.
"Sorry about this, John. They tried to enrol you, right?"
"Yeah. How did you know?"
"Our family is magically potent, an unfortunately, you're female where it counts. This is a major problem."
"Why?" you squeaked, anger turning to fear.
"I can't change you back right now, and I don't know when I can, if ever. I can enrol you if you desire, and allow you to get some measure of revenge on those two. If you do so, you will become a witch. Option two is to send you home."
"I can't go home looking like this!" you protested.
"True. We'll clean you up, give you a haircut, new clothes. Unfortunately, there is nothing I can do for your... problem, and it may be that your body will change before I can find a solution."
"Change?"
"You're a teen, John. Unfortunately due to those two's meddling, you're going to face girl's puberty. Sooner or later, it will become obvious that your hips are widening, or that your chest is becoming puffy and sore. It would be easier if you were a few years younger, but... I'm sorry. The other option is to cut your loses, dress you up, and send you home as the teenaged girl you unfortunately are. I'm sorry to be blunt, but it will avoid the major fight that will occur if and when your boy disguise fails with our second option."