You stare dumbfounded at your belly, rubbing your hands over it to where they disappear from your view under the curved expanse. Your mind screams for you to find some help--go to a hospital--but you're frightened of finding out what's happening to you.
Your thinking is suddenly interrupted by a stirring within your gut. You clutch your belly as a pressure begins to build within it, centering toward the front. The discomfort increases, and you watch in awe as your navel swells up, popping out from an innie to an outie. You groan: Are you going to blow up like a balloon? Or just... blow up?
You close your eyes, holding on to your gut and breathing heavily from this feeling you will outright explode, but the pressure begins to lessen, as though some sort of dam has broken. You heave a sigh of relief, but begin to feel a new sensation: something cool and sliding across your belly. You open your eyes and give a startled cry as you see black latex oozing out of your distended navel and spreading across your swollen gut in all directions! You quickly move your hands away, not wanting them to get caught up as the latex encapsulates your belly in smooth, black sheen.
The feeling of the latex moving across you makes your remaining normal skin crawl, but it's nothing compared to the sudden feeling of the sentient liquid against your crotch. You yelp as you feel it slide over your manhood, the sensation almost numbing as you hesitate reaching down to feel what's going on beneath your gut. But when you hear a sickening schlurp and feel the latex suddenly inside you, you throw caution to the wind and reach around, feeling and confirming your fears as the last of your male genitals disappear into a new slit, latex oozing inside to likely develop new, female plumbing.
You feel ready to cry, but can't yet as you feel the latex now roam up your backside. You look behind you to see the latex spreading over your rear, swelling and shaping it into a more womanly shape, your hips flaring out beside your belly.
Your entire middle, from your pregnant-looking belly to your hips and newly-formed vagina, has been consumed by the black latex. It quite obviously has plans for you!