"Emily, for as far back as you remember, you've always been deeply aroused by your own penis envy."
Emily's eyes suddenly glazed over and soon, the whole room around her seemed to blur. You rubbed your eyes, only to find that everything was back to normal...
And in many ways, it also wasn't.
Emily's room had always been quite sober and muted, as well as relatively gender-neutral. Now, it was clear you were standing in a girls room, and many things around the place seemed to confirm that fact: pastel colors, pink bedsheets, à vanity... In fact, Emily herself was dressed quite differently... Her jeans had been replaced by very tight, very form-fitting leggings, and she now wore a larger shirt that hung off her petite frame quite cutely, one of her naked shoulder peeking from the oversized head opening.
You admitted you were a bit confused... You had wanted to give her penis envy. Shouldn't she be ashamed of presenting herself as such a girly girl? How come everything changed to make her more feminine then?
"So, Em. Tell me the whole truth, how do you feel when you dress so girly?" you asked tentatively.
Emily blushes coyly, squeezing her thighs together. "I feel so humiliated... And wet." she admitted openly, yet shamefully, as she grabbed one of her stuffed toy and pushed it onto her lap, avoiding your gaze bashfully. "Since I was a little girl, I've always been so jealous of boys! Of how big and strong they are just because they won a genetic lottery and have this thick, male thingy between their legs and I don't!" she mewls softly, Grinding softly against her stuffed toy as she talks.
"At first, I thought I wanted to be like them, like you! That if I woke up with a penis, I'd be finally happy but... After opening up to my friends, I realized that it's not really wanting a penis that gets me all tingly and needy... It's being told I don't have one! " she was breathing heavily now, her nipples stiff like two little bullets poking at her shirt as she grinded herself against her stuffy with more and more abandon.
" To be told that I'm short! Girly! Weak! That I'm flat and cockless and petite and silly! To be told that I can't pee standing up like a boy, or that I'll never know what it actually feels like to have a big, beautiful penis like you do! That's the thing that I dream of at night!"
The realization hit you. You didn't just give her penis envy, you made her desperately aroused by her own penis envy! Now, everytime your little sister was being reminded she wasn't a boy in any way, she grew horny and wet like the silly needy girl she was.
With an grin, you sit beside your sister on her girly bed, while she's humping her stuffed animal desperately. "I mean, it's not your fault you feel that way, little sister. If I was a girl like you, I'd probably feel just as ashamed of not having a penis as you are. You can't help it if you wish you were big and hard and erect, and in reality, you only feel wetter, emptier and needier. Hmm?" you tease.
She moans loudly, each of your words making her more desperate for release.