"Emily, for as far back as you remember, you've always been deeply aroused by your own body, haven't you?"
Her eyes go wide in sudden surprise as you 'discover her secret' at the same time the Veil makes it true. She looks away shyly as an undeniable musk permeates her room. As reality rewrites itself, you see that your little sister now sits with her legs closed, thighs pressed against one another. Short bursts of muffled whirring noises can be heard from where she's sitting, every time making her squirm and blush all the more. Behind her, her laptop suddenly finds itself with several dozen more tabs in incognito mode, many of them muted.
You smirk as your newly masturbation-starved sister attempts to find the words to explain her shameful obsession, unaware that she hadn't always felt this way. "I mean... Look who's talking, right?" she says, motioning vaguely at you. "I've seen your own internet history while I was looking for something goo... I mean, I accidently saw it and... Look its not my fault we both have insatiable libidos! It's probably a genetic trait!" she says, just as the sex toy buried between her legs sends a naughty little pulse that makes her quiver and clench her teeth cutely, trying to remain proper. "... It's only natural. "
You chuckle." For guys maybe. I haven't ever heard of a girl your age spending so much time moaning into pillows and watching porn."
She rolls her eyes and sighs. "You think it's fun? A girl having a boy's sex drive? Think again!" she says, looking genuinely annoyed. "It's not like I can just reach one orgasm and POOF, I'm done! Most of the time, I need several more before I finally feel satisfied... "
She shakes her head and sighs. "I had to get that part-time job at the library just so I could afford some toys! Sometimes they help. Sometimes... They just make things go in to overdrive..." she shrugs, her stiff nipples poking at her thin shirt as she leans back against her chair. "I got used to it. Anyway, It's not like I can think straight until I've taken care of my needs, so..."