Take her on an adventure

Sophie: "God, you're really wearing yourself out getting off this many times, huh? Well, at least you're big enough for me to get a better handle on you. Come here!"

You carefully scoop Stacy into your hand and lift her up to your chest, dropping her into your mile-long cleavage and holding an arm under your breasts to give her better support.

Stacy: "Hey, what the-?"

Stacy is quickly silenced after being stuck into your soft cleavage. She finds acceptance in the situation, and doesn't try to wriggle away. Not that she'd be capable of it.

Sophie: "There, that should be a comfy resting spot. Don't worry about being smothered. I've become so powerful that I apparently don't need to breathe anymore, and I expect it to apply to you as well."

You stand up and start to wander around the area where you used to live, looking for something fun to do; as much as you'd like to keep masturbating and growing, you'd risk losing Stacy and being alone again, so you'll just have to wait until she's ready to continue.

Sophie: "Hmmm, you know, people are smaller than ants to me now, so I don't feel like there's much point in messing around with them. Want to go make sculptures out of mountains or take a bath in the ocean or something?"

Stacy: "That sounds more like stuff that you can do, Sophie. I can't be lifting mountains, especially not with my damn back. Can't we go and squash Detroit or something? I always hated that place."

Sophie: "What a specific thing to want, but you have a point, Detroit does suck... ah, what the hell, we're probably not going to be on this planet for long anyway. Off we go!"

You estimate the direction of Detroit based on the position of the Sun, and then start running in that direction with no regard for what you might be stepping on, only glancing down between the clouds every now and then to make sure you're not about to trip on a mountain. Once you're able to see the Great Lakes, and by extension Michigan, it becomes easier to pinpoint the rough location of Detroit.

Sophie: "We're almost there! Want me to let you out so you can get in on the action?"

Stacy: "Yes, please!"

You drop Stacy off at the edge of the city, and she starts to rampage through it. Rows of buildings topple with a single swing of her buoyant boobs. To you it looks no different than a bunny eating its way through a cabbage patch. You could stomp the city out of existence with one footstep, but decide to let Stacy work her magic.

Eventually, after all the tall buildings (that is, buildings that reach her waist) have been mowed down, Stacy gives you the signal to bring devastation upon the city.

Following Stacy's lead, you get on your knees and lean forward, slamming both of your breasts into the city to smash it completely, leaving two gigantic craters in the ground where Detroit used to be.

Sophie: "Good riddance, haha! God, that did feel good. I can't even see or hear any of the people in this city, so they can't spoil my fun!"

Stacy saunters around the edge of the crater, admiring it. Her legs shiver with arousal. She slides down the massive chasm and jumps into the pit created by your nipple and begins to vigorously masturbate, your actions renewing her stamina.

Stacy: "Ahhgh! Nrh! Graa! Ah! Aaaah!"

She cums again, and grows to 3 miles tall. Now she's already too large to hold in your cleavage. You decide to hold her in a stronger but still very intimate way. You crouch down near the center of the crater and spread your legs around Stacy, giving her a full view of your wet vulva.

Sophie: "Looks like that helped you catch up a little more! One more orgasm from you and I'll need a few more of my own to stay ahead!"

You bring your thighs together, gently squeezing Stacy between them and inching her closer to your crotch. Stacy is caught in the supple pink flesh of your car crusher legs. She tries to yell something to you, but it's all muffled by the folds of your thick thighs. Naturally, since she's a giantess too, she doesn't need to breathe either, so you can maintain this for as long as you like.

Your arousal gets the better of you yet again, and you slide Stacy all the way up against your vulva to squeeze her against it. It's not like you'll lose her to just one orgasm, right? You grind her faster and faster, making sure not to hurt her, while squeezing and pinching your own nipples.

Sophie: "Nnngh, fuck, this is hot! Get all up in there, Stacy!"

Stacy doesn't need to be told twice. She can hear your booming voice as it vibrates through your body. Your wet folds are a welcome sight for her - she plunges her head straight in and starts to lick, no matter how insignificant it might feel to you. She tries to finger herself to a release but her body adamantly refuses to.

Feeling Stacy start to get into the size difference sex, it only takes a few more seconds for you to reach your orgasm, moaning loudly and having another significant growth spurt. Thinking you must be big enough now, you reach down and try to push Stacy all the way inside your vagina, to make sure you can still feel her.

Sophie: "Ahhh, fuck, that was good! Don't forget to make yourself cum too, or I won't be able to feel you soon!"

Stacy slips inside and thrashes around to the best of her ability, desperately trying to cum, but it feels like this only serves to further your orgasms. You rack up three more, while Stacy gets none. She's now relatively so tiny that she's probably stuck floating inside a single droplet of grool.

Another problem starts to rear its head. The planet underneath you is giving way. Your body mass exceeds it, and the feeble stone ball blankets your backside like an affectionate manta ray.

Sophie: "Ah, damnit, there goes Earth...well, I guess that's just how this goes. Hey Stacy, are you still in there? Don't give up, okay? Just because I'm a celestial body now doesn't mean I don't need someone to talk to now and then. I just crushed the whole planet if that turns you on."

You push what remains of the Earth away from yourself, and take a moment to enjoy floating in space, hoping your body has stolen enough of Earth's atmosphere that Stacy can hear you speak. However, you hear no such thing.

You decide to settle into a nice comfortable position to hopefully wait out until Stacy cums herself onto a reasonable size. There you remain, still orbiting the Sun at around the same pace as Earth did. It baffles you how you could possibly be moving at all. After a while, you feel something sliding up to your butt and think it's Stacy, but no, it's just the Moon colliding into you, unable to contend with the combined mass of you and the Earth's remains.

A long while passes. You start to get bored, and with nothing else to do, your mind wanders towards self pleasure. But no, you must refrain! You don't want to lose the only other giantess, and the only remaining human being in existence, even if she used to be a big bitch, as opposed to the relatively small bitch that she is now.

Sophie: "Maybe I'll just sleep it off..."

You're unsure how much time would've passed by now, but in any case you've had a busy day. The cooling embrace of outer space and the softness of zero gravity lulls you into sleep.

After sleeping for almost 10 hours, you're awoken by Stacy. To your amazement and delight, you see that she's now about a hundred times taller than you, her height rivaling the Sun's diameter. You're flustered and still a little groggy as Stacy picks you up to her hand. Despite the lack of air, you're able to hear her speak:

Stacy: "Morning, doll. I took the opportunity to jill off as many times as I could, and here are the results! There's something I've been wanting to do to you for a long time..."

Stacy lifts you higher up her body and presses you snugly into her ample cleavage.

For the next few weeks the two of you take turns growing, or at least they feel like weeks to you, though knowing relativity, it might actually take eons. You sleep inside each other's boobs so you don't drift off, and spend every waking moment having size-altering lesbian sex while erasing star systems, galaxies and soon galaxy clusters with every swing of your wanton limbs.

Soon your fun is over, as the limits of the universe start to encroach upon you. With your back against one edge of the universe and Stacy's against the other, you each orgasm one more time and breach the universal barrier, destroying the laws of physics, and by extension yourselves.

ENDING 92 -Sapphic Space Adventure-