Annette actually jumps up and down. "Pick me, pick me!"
You and Jamie both laugh. "Ok," you say, "what do you want?"
Annette blushes a bit. "I know this is going to sound weird, but.." She points at your tummy. "Do you think it's possible for me...to go in there?"
You blink. "Wait, what?"
Jamie perks up. "Oh wow, what would that even feel like? Hey, do me too!"
"Hang on, both of you. Think about what you're asking, you want to be unborn? And you want me to..be your mom? I'm a guy, you know!" You feel beads of sweat forming on your forehead.
Suddenly both of them are giving you serious puppy eyes.
"Ugh, fine! If it's possible...but it won't be for long, ok?" You start fiddling with the options on your phone. You decide to have some fun with this. "Ok, here we go!"
The changes begin to take effect, as they both begin to dwindle, becoming smaller and smaller. They regress only to about the age of six or so, but they become very tiny in size. You scoop both girls up, as they stare up at you in awe.
You press the both of them against your vagina, and it feels pleasant as they squirm and shriek, their tiny voices making them sound like mice. There's a sudden warmth, and the two of them are absorbed into your body, entering your womb, where, you assume, a pair of umbilical cords are attached to their bodies.
You find yourself having to sit down, because the process has made you incredibly horny. With your girlfriend temporarily unavailable, you're forced to pleasure yourself. It feels incredible, but you start wishing you were even more sensitive.
With a goofy grin you reach for your phone. Annette claimed being younger made sex far more intense. You can't go too far back, after all, you have no idea how that would affect your pregnancy. You set the changes and are overwhelmed by intense waves of pleasure.
Your fingers seek out your crotch, and you alternate between rubbing and thrusting, and your pussy becomes incredibly slick. You reach for your breast with another hand, stroking and teasing the soft flesh and the nipple. Slowly, you feel the breast shrinking even as your pussy begins to tighten. The sensations are so intense they feel like electric shocks of pleasure, and you can't help but make soft moaning sounds until you finally gasp with release.
As you lay there, your hand slick with your own fluids, you can't remember how much younger you were supposed to become. Once you trust your legs to support your weight, you get to your feet. Looking down at yourself, you see your chest as flat as a boy's, with small, pink nipples. There's no sign of body hair- your pussy is smooth and it feels a little strange to the touch.
Judging by the furniture, you have to be well under 5' in height, and you make your way to the bathroom, where you are confronted by the reflection of a girl of maybe 11. That was younger than you intended!
You clean up quickly and retrieve your phone, scanning yourself with the app. Thankfully, you're still pregnant with the two miniature girls. You stroke your belly, shuddering at the memory of pleasuring your body as it regressed- no wonder Annette likes it so much?
You have an evil thought, and make another change to your unborn sweethearts. They will wake up soon, fully aware of where they are. And horny. Intensely, insanely horny.
The thought of them scrambling about inside your womb to pleasure themselves- or perhaps even each other, turns you on, and you make your way to the bedroom to find Annette's vibrator.
You wonder how it will feel, inside your tight young pussy. Or how it will feel if you shrink yourself a little bit more...