"Corporal", finished Lindsey. "Knowing you, that's probably the best of the bunch." This was one of my favorites, "As you wish..." I say, stifling laughter at what's to come next, "Now strip." Lindsey's indignant outrage came out right as expected, "No way!" I grinned, "Guess I'll have to do it myself then."
I flick my wand at her then begin to approach slowly, cornering her. She catches me by surprise though by tackling me onto the floor. As we grapple, I'm surprised by her strength, she's at least as strong, if not stronger, than me. She quickly gets the upper hand and pins me down. She reaches for the wand but, thinking quickly, I flick it and it disappears. I'll re-summon it when this is done. She roars in rage as the wand disappears from under her fingers before turning her attention to me. I stop struggling and a smirk replaces her blatant rage as she looks at me with a smug grin, "Not so strong now huh? You were going to 'punish' me were you!? Well too bad!" She's breathing heavily now, "Cause I have the upper hand!" I ignore her rant and watch her for signs of the change. The first one I don't see, but rather feel. Slowly her body is getting lighter. Then I see the changes in her face, her sharp, boyish jaw rounding out through childhood. "What do you have to say to that!" She screams in my face, and I decide that I've humored her long enough. I twist and quickly spin her around, pinning her in the same way she had just pinned me. "Nothing, nothing at all." I respond, smiling. She struggles of course, but there's no way she's going to escape. By my best estimates she's currently only 14. I watch her body continues to subtly shrink, becoming younger. Lindsey though has expression of terror on her face, presumably noticing something's wrong as she goes through puberty in reverse, her breasts flattening out. "What?... My chest.. Wait, why are my clothes so big?" I smile at her confusion. Her body, now about 10 years old, stops shrinking. "Well, guess that's as small as you're gonna get, come one now." I lift up my ex easily as she struggles, screaming bloody murder. I sit on her bed and seat her on my lap while I wait for her to calm down. Eventually, she tires out and I ask her, "You done yet?" She tries to spit into my face, but misses, "Burn in hell." I laugh, not just my normal laugh, but a nice, big, mocking laugh, "Sorry, not gonna happen."
I flip her over suddenly and she shrieks as it happens, her voice hoarse from her earlier tirade. I pat her gently on her butt, "So you chose the corporal punishment. I don't know what possessed you to do that, but I'll certainly have fun." I stroke her rear as she struggles, "By now you've probably guess what I'm going to do, but I think before I start, you'll want to hear your situation first." She quiets down, I knew that would get her attention, she's a reasonable person, she knows when she's beat, and she knows that information might make things easier for her. "That's a good girl. So you should know that you're now 10 years old as far as everyone else, and your body, is concerned. Your parents, being busy people, are currently on an indefinite trip to Germany for work reasons. They don't know when they'll be done, but in the mean while, they've asked me to take care of you". I watch the gears turn in her head, her eyes light up though as she stumbles across something she probably assumes I missed. I delightedly crush her hopes, "And don't worry, nobody will think anything I do to you is weird, no matter what they see or hear." She slumps at that, the fight gone out of her. "And with that out of the way, it's time for your first punishment."
Rubbing her rear through the too large jeans one more time, I quickly pull her pants off. I'm rewarded with a yelp as she reaches for her butt, but I've already moved to her shirt, leaving her in oversized underwear. "Please stop Ted.." She begs me, crying, actually crying, not that fake stuff she did earlier. I don't even hesitate though to slip her bra off. Of course, I can't see anything with her face down, but she bursts completely into tears anyway. I decide to prolong this psychological torture a little longer with her panties. I pin her hands then slowly slide her panties down, over her butt, and down her legs, before tossing them across the room. I tickle her cute pussie as she sobs, then rub her rear softly before lowering my hand on it with a smack. The screams are oh so satisfying as I do this over, and over, and over. I briefly pause to summon the wand and wish that my hand wouldn't get hurt from this before going back to abusing her flesh.
***
Several hours later, I stop, not because I'm done, but because Lindsey passed out. I roll the kid (still whimpering in her sleep) onto her bed and stand up to dust myself off and think. I summon the wand and eye Lindsey's exposed rear, now almost black in spots, and begin to think about what I want to do next. I first need to tend to Lindsey's health, since while I want to more or less torture her, I don't want to actually injure her permanently. I flick the wand and wish that while under my 'care' Lindsey won't retain permanent or lethal damage, but that she'll still feel the pain from it. A quick glance shows that her butt looks the same, but now I know it won't scar permanently nor get infected. Next look around her room and wave my wand at her closet and dresser. All of her clothes vanishes, including the clothes on the floor. I do the same in the rest of the house, ensuring that there's nothing for her to wear when she wakes up. Lastly, I use the wand to lock all the doors and windows so that Lindsey can't leave. I glance at the clock and yawn, before heading down to Lindsey's parents bed to sleep.