"I don't know my child. You will have to find that out yourselves. There is no magic left in my shop to rival that of the orb and not much is known about it anyway.", Mrs. Maple told Robert and Greta.
"It's not so bad, you know. Your sister is pretty big for a girl, I'm sure you will get your strength back in no time! And you Greta, you are on the basketball team, yes? Just think about what you could do with that height boost you just got!", she tried to cheer them up.
Maybe she had a point, Robert thought, ignoring the greater picture in his shocked state. He was way lighter and slimmer than anybody on his team. Combined with his skills an a firm training routine, this could prove to be an advantage! Greta was also kind of blinded by the idea, that she would now tower over bitch Brittany from her team. They both almost forgot for a second, that they swapped genders and everything that was implicated by that.
"M-maybe you are right. There might be something good about this mess.", Robert said, unsure of his own words. He felt like he was just sold a broken pickup truck by some sleazy used car salesman. His words made Greta feel visibly less worse about dropping the marble, so he took at least comfort in that.
They both leave Mrs. Maples store and returned back to Roberts car. Both siblings had a weird feeling of helplessness. Not knowing what to do, they decided to drive home. Robert took seat on the driver's side and Greta returned to the passenger seat. Luckily, Robert didn't really need to adjust his mirrors, since he has only lost a few inches in the swap. Subconsciously, he closed the door and grabbed the seat-belt, like he always did. Without thinking too much about it, he buckled himself on, and suddenly found himself with the strap between his sister's former boobs. Really not expecting the sensations, he looked down at himself once again and took the reality of his situation in. Slender, girly body, hairless legs, tiny feet, flat crotch, boobs. His face got red from embarrassment, while he started the car.
"I'm sorry.", Greta told her brother.
"It doesn't matter, it wasn't really your fault.", he replied.
As they drove, Greta inspected her sports back. To her surprise, it still contained a basketball uniform, only now it was the boy's version. It still had her name stitched on it, so she deducted, that something in reality must have changed. This gave her an idea. Without saying a word, she grabbed her brother's wallet inside the glove compartment. It still had his name and previous body's sex! Looking at the picture, it still had his face, but below that was something similar eery to the sight now sitting beside her. His shoulders were bare and looked slimmer than they should. She could see the beginning of a especially girly dress she used to own a few years back and had to picture her brother wearing it. Not to upset him anymore, since he did seem to take this whole thing in a lot worse than she did, Greta stifled a laughter with all her power.