"I'm... I'm sorry!" you snivel, shuffling away from your little sister. You try to say that you didn't mean it, but the compulsion to never lie to Emily is too strong. "I d-didn't want you to take it that badly!"
"Oh no, you're not getting out of it that easily... You were always pretty liberal with your insults, especially toward me... I won't accept that anymore, is that clear?" she asks, grabbing your chin and forcing you to look up at her.
You nod. "Yes Emily."
She nods in unison with you. " 'Yes Emily' is right. But we can't have my sister going around town with such a potty mouth, spouting "Fuck you"s to anyone that ruffles your feathers... What would you think if you saw a girl say such things in public?"
The truth comes out of your mouth unbidden once again. "I'd be repulsed... Girls should be nice and proper. They should be coy, modest... Not swearing like a sailor."
An evil smile stretches Emily's mouth. "Such a mysoginist. A bit ironic considering your current situation, hm?" she shrugs. "But, if you TRULY believe that girls should act this way, then I should make sure to help you become a prime example of that, right?"
You shake your head vehemently. "I mean... Not for me! I'm not really a girl!"
"Oh, but you objectively are, sister... Quite a feminine one too." she licks her lips excitedly. "In fact, let me tell who I think YOU are based on your opinion of women. To start, you won't ever want to fuck anyone ever again. The idea of BEING fucked, however, will make you desperately aroused. After all, like you said, it's not proper for a nice young lady like you to have such dominant and boyish wants. As a proper young woman, you will always feel wrong taking charge. You feel deep pleasure at being obedient, meek and docile. When it comes to sex, you'll be shy and bashful, hiding your humiliatingly-high sex drive behind a facade of naive innocence... And since you believe girls should exist only to be subservient to their partners, you'll always find yourself developing complementary fetishes, desires and yearnings to anyone you are even mildly interested in."
The deluge of reality-altering statements rush into you all at once, making you wince in pain as a headache blooms from all these new wants and thoughts.
No longer having enough confidence to be able to hold your sister's wrathful stare, you meekly look at the floor. Scrambling, you assess your thoughts to see the extent of the damage.
You focus your thoughts of your favorite porn star, picturing her in all of her naked glory... You were always attracted to her because she looked so submissive, so needy.... But now, you can't even imagine being in a position of power over her, your thoughts instead turning to her sweetly pushing you down, her fingers gliding down between your thighs to finger you gently. You gasp in horror as you try to remember your past as co-captain of the basketball team... But it feels alien for you to think you'd ever accept a position of such power. After all, you'd much rather be told what to do... Just the thought of it sends pleasant chills through your spine and...
"Oh god..." you whimper. "You... You made me into an incel's wet dream!" you protest weakly.
Emily shakes her head. "No honey. YOU did."