Slime Shaping

Before you can reply, you feel the slime in your stomach shift abruptly. Not much, not at first, though even that motion makes you queasy.

"Ungh. What the..." you grunt. And then it begins to *roil*. Your stomach is visibly undulating, and you feel yourself start to panic.

"Ooh, it's starting!" Sally exclaims excitedly, taking a seat beside you on the bed. "I love this part."

"Sally," you gasp. "What the hell is happening?"

"Ooh, don't worry babe," she says soothingly, as she takes your hand. "I know this part can feel icky sometimes, but it'll be over soon. And once it is, we get to be sisters again!"

"Sisters...? Sally, you aren't..." Your words are lost to groans as you feel the mass inside you writhing. It's a bizzare and unsettling sight, seeing your stomach move as if with a mind of its own.

"Shhh, shhh. Let me talk you through it." Sally settles in beside you and lays a hand on your stomach, quelling the writhing a little. She looks into your eyes and speaks slowly and soothingly to you.

"So, my slime kind of has what you'd call 'instincts'. It's not alive, not really, but when it isn't attached to me - when I'm not controlling it myself - it has a set of behaviours it'll follow."

"Of all of them, the first instinct is the most important - it'll attempt to change into the shape it's most comfortable with. And it just so happens that the slime that makes up my body likes to look like..." She gestures down to her own body with a flourish. "Me. And really, can you blame it?"

"Sally," you groan, feeling another alarming shift take hold. It's like the slime is trying to push through your stomach. Not painful, not yet. But damn if it isn't weird.

"Ooh, sorry baby. Bad time for a joke. Um, so the other thing slime is really good at is manipulating bodies. Soooo, if it isn't in a container that suits its favourite shape, well...the shape will just have to change."

"So I'm...changing?"

"No, baby. Not yet. The slime is getting used to the space that its in. But once it does that..."

She kisses you, and it's impossible to miss the excitement in her eyes, or how hard her cock is. "You'll start to change, baby. You'll be Sally-shaped and Sally-sized. You're going to look just. Like. Me."

As soon as she finishes her sentence, the roiling in your stomach stops. Slowly, with a sound like a gurgling drain, your bloated stomach begins to drain. Soon, it's back at its usual size, and there's a moment of calm. But you know this isn't the end. The slime is still inside you - you can feel it. And now, you know what it's about to do to you.

You look at your girlfriend, feeling like you're in a dream. You take in her pretty blue eyes, her dark hair, her excited and cheeky smile. Her perky breasts, toned midriff, smooth thighs...big stiff cock.

"Just like you?" you mutter, dazedly.

"Just like me," she says. "I love you, baby."

And then, you feel the changes begin.