With the veil in hand, it would be easy to give her what she was craving for. You simply had to be careful how you phrased it... But something felt strange to you.
Emily had always been very proper. It was strange for you to imagine your little sis not only discovering she had sexual desires, but for those desires to be so... Humiliating.
"Tell me, em, when exactly did you first realised you craved to be a little girl?" you ask plainly.
She stops humping her pillow for a moment, looking pensive. "I think it was a few days ago? I had just recieved the box with the Veil inside. I was playing with it while I was chatting with Valerie over video chat... We were talking about the boys we liked." she says before resuming her idle grinding.
"... And do you remember saying anything at that time? Something that may have triggered the veil? "
"Oh... Uhm.." she places a finger on her lips, tapping them softly as she thought. "I may have said something about how I liked seeing Andrew's abs in PE... I was so ashamed of admitting it, I said 'I'm such a pervert'."
You smirk. There it was.
It just so happened that your little sister accidently made herself a pervert. No wonder she'd been having these new and powerful desires out of seemingly nowhere.
" Aww. Well that's cute Em. Looks like you accidently made yourself into a debauched deviant. Not your best move I'd say..."
"That....hmmm....that'd explain it." she moans absentmindedly, bucking her hips sexily against the pillow between her thighs. "It all feels so... Real though... So overwhelming. I... I really want all those things to happen to me."
You grin. "Spoken like a true pervert. So... You're saying that you'd like it if I said something like..." you lean towards her, whispering in her ear. "You're just a naughty, horny, silly little girl."
Emily moaned loudly, her hands shooting up to her budding little breasts as she started shrinking in her clothes. "Yes!" she mewled. Her whimper growing in pitch as she dwindled before you, growing younger and younger as she humped her pillow faster and faster. Her hands were soon fondling nothing but the tip of her stiff little nipples, losing what little breasts she had. Her hair tting itself up into pigtails.
You watched you sister regress back into a little girl before your eyes, her blossoming curves vanishing into her childish form. She cooed cutely as she slid down her pillow, growing too large for her shrinking thighs, and plunging her dainty little hands into her oversized panties, looking for some relief.
"I wan dat! I wan be a widdle guwl!" she babbled naughtily, writhing in extasy as her form shrank further and further down...