Sally-shaped - but not quite Sally-sized

There are two Sallys in the mirror. One of them - the one standing beside you - is Sally as you remember her. Her slim, toned tummy, her pretty blue eyes, perky breasts with cute pink nipples...you could describe her with your eyes closed.

The Sally standing next to her is...very different. Facially, she's identical - same cute, upturned nose, same high cheekbones and bright eyes. But everything from the neck down is a totally different story.

For one thing, *this* Sally looms over the other. You know 'your' Sally is about 5'4 - so this one must be at least six feet tall. She's so tall, she barely fits all the way in the mirror. For another, her proportions. Your Sally, as she's used to her, had always been athletic - trim, fit, and perky all over. But the girl - no, the *woman* standing next to her - has something else going on entirely. Namely, she's *thick as hell*. Big, round breasts that swell from your chest in seeming defiance of gravity; a trim, waspish waist stretching into wide, rounded hips; long, shapely, hairless legs...and between those legs was...

Well, Sally's dick isn't as familiar to you, but you know your own, and this dick...isn't yours. It's too long, too slim, too hairless...too pretty? Can a dick be pretty? Well, if Sally's dick is pretty, then this one is pretty in the same way, while also being noticeably bigger. You're still developing a taste in girl dick, but something about seeing those extra inches on a cock that you already know feels good inside of you is setting you off something *fierce*.

But strangest of all the differences is that this Sally is *you*. When you raise a hand, so does she; when she raises the opposite, so do you; and when you put your hands under your tits and jiggle them around, she does the same.

'Wha...' you say, then stop. That isn't your voice. You try again. 'Sally, what...'

But no matter how many times you go to speak, it's your girlfriend's voice coming out of your mouth. Beside you, Sally - the Sally who *isn't* you - giggles.

'See? You're like me now. Although...you're closer to a big sister than a twin.'

"Big" is right, in more ways than one. You turn to the side in the mirror, still mesmerised by your new body. In profile, your proportions are even more ridiculous. Your torso is shaped like an 'S', with your massive tits in front, and your pert, round ass behind. And despite carrying a lot of extra mass, it's gone to all the right places - your stomach is flat and toned, and your legs, while visibly thicker to accommodate your increased mass, are well-muscled. Beside you, Sally plays along, turning side-on as well. It's the perfect contrast - she the trim and perky girl-next-door, you the thick, mature bombshell. It's enough to set your lengthened cock bobbing - and the sight of that stiff member, swinging between the legs of such a feminine body, is even more exciting.

"So, what do you think?" she asks you. "I really worked some wonders on your figure, didn't I?"

"Um," you say, in her voice. "You sure did."

" 'You sure did?' Is that all you have to say?" she teases. "Look at your lovely big boobies!"

She grabs for your chest, and you're not coordinated enough in your new body to fend her off. Of course, once her hands find your nipples, you're not sure you want her to. Your new tits are *amazingly* sensitive, and before long her clever fingers are coaxing some remarkably feminine moans out of you.

She grins up at you excitedly, her stiff cock bobbing as she toys with you. "Oooh, Stevie, I just love doing this to you. You're the best sister ever!"

With an excited squeal she shoves her face between your titties, and you suddenly find yourself on the other end of a motorboat. Your new body is pretty ticklish, and you feel yourself writhing and bucking against her. Between your reflexive squeals and giggles, you beg her to cut it out - but Sally is nothing if not tenacious! When she does stop, it's only because she wants to - and she doesn't until you're red-faced and breathless.

"See?" she says, popping her face out from between your tits. "Isn't it just the best, being like this?"

"Yeah," you pant, reflexively. You answer without thinking, but you mean it. Having boobs is so much fun - and seeing how crazy they drive your girlfriend is even more so!

"Of course, having you Sally-sized is normally part of the fun," she continues. "So as much as I *love* this" - and here she digs her fingers into your big, round rump for emphasis - "maybe we can offload a little of this mass? Get us back to being twins again?"

"Of course, on the other hand," she adds, mashing her crotch against yours, "we could always have some fun with this body, too..."

Looking back to the mirror, you consider the offer. If anything, you *should* want to turn back to your regular, everyday self. At least, you feel like you should. But for some reason, your feelings about the prospect are... ambivalent. Maybe it's how jaw-droppingly sexy the girl in the mirror is, or how enthusiastic Sally herself is about your changes. Heck, maybe having Sally's slime in your system is making you a little more flexible about these kinds of things. Either way, being shaped so dramatically, and knowing you could be shaped even further, is... actually really exciting to you. Thanks to Sally, your whole body has become a playground - so why not play around a little?