Kat twirled the wooden wand between her slewk fingers. "I'm such a loving sister, I'll let you choose which animal you're going to be."
"Erm... what kind of animal?"
"Well I don't know! Any! Think of any animal in the world, and I'll do it. If you don't hurry up, I'll pick one for you..."
Dan racked his brains for animals that he liked. He was trying to think of something that wouldn't end up between bread and served with fries...
"Right, I'll be a... a... a donkey."
"What?!?" Kat exclaimed, jubilent. "You're kidding, right? A DONKEY?"
Dan stared defiantly at her. "You asked me to choose. I chose. I choose a donkey. You got a problem with that?"
"No, not at all," Kat chortled. "It's just that it's too perfect. My little brother, such a jackass, and he actually CHOOSES a donkey to turn into. Well, little brother, that just makes it way too easy, but, OK! Just remember, oatbreath, it was YOUR choice. Now, take off your clothes."
"What?!?" Dan replied, startled. "No way!"
"Have it your way," Kat shrugged, and pointed the wand at him. "You had your chance...."
Dan stood defiantly with his arms crossed across his chest. He didn't really believe all of this, anyway. Witches, indeed!
But the physical evidence of the transformation soon changed his mind. He didn't notice his ears turning hairy and growing taller on his head as much as he noticed a pressure at the back of his gym shorts. As he reached back with hands growing clumsy, with shortening fingers, he fumbled with the waistband, pushing it down at the back. His nascent tail popped free to wave behind him. He stared with astonishment at his sister. "What have you done to me?" he demanded, with a voice grown suddenly hoarse and dissonant.
"Just what you asked for, jackass." Kat grinned. "Didn't believe I could do it, did you? Any last words?" She smiled triumphantly as she watched the changes progress.
"I'll tell Mom," Dan said, as he watched his hands complete their transformation into hooves. "You can't do this to me... to meee... to meehaw! Eehaw! EEEEhaw!" His voice faded away into a coarse bray.
"Say again?" Kat said sweetly. "No, really, go ahead. WHAT are you going to tell them? Anywa, YOU chose to turn into a donkey. When I asked you what kind of animal you wanted to be, you COULD have said human. But noooooo..."
Dan didn't have much more to say, as the bones of his pelvis shifted and forced him forward onto all fours. His skin became a furry pelt, his nose finished growing out into a muzzle, and his change was complete. Kat did not have a brother any more; the family had a new donkey. Dan stood there nervously, lifting his hooves up and down experimentally, his tail switching behind him. Kat clapped her hands together with delight.
"Excellent!" she said. "You're a MUCH better donkey than you EVER were as a brother! How do you like it?"
"Eehaw! Eehaw!" Dan replied.
"As eloquent as ever," Kat grinned.