Not a chance

You want to gasp, to scream, to cry out, to do anything at all, but you simply smile and begin walking towards the water. Reaching down to find your clit with the intent of pleasuring yourself, your hand doesn't even quite find your clit, as it instead rests on top of the mass of slime extending from your pussy, but the arousal of being filled causes the succubus's outfit to again disappear from sight, giving you a full view of the green gel at your crotch. Moving just to the edge of the pool, you feel yourself willed to sit down on the glass, your legs sliding into the water up to the groin, the slime seeming to drink in some of the liquid.

As you sit down, the slime at your legs starts to morph and extend outwards, slowly forming a phallic shape just above your pussy, and within seconds it's as if you had a penis yourself, seven inches in length, though it is a pale, translucent green. Your hand finds its length, and begins to stroke, and as you do you feel almost as if it is real, experiencing the sensation as if it's your own. Underneath, some of the slime forms the twin spheres of balls, and some of the water that was sucked in by the slime seems to swirl together inside, distinctly visible through the clear skin.

You continue to stroke yourself, and while the sensation is nothing if not pleasurable. The slime's influence on your mind further ensures that much, especially in the foreign sense of feeling the sexual organ of the other gender. Your thoughts earlier having gone to the witch, you realize that this is what she had offered you, and in your suppressed state you can only think about what that would've been like.

All of that is even before you reach the point of orgasm, the slime's artificial testicles pulsing and filled with liquid. You feel yourself contracting into the slime that fills your cunt, its mass greedily sucking in your juices, but quickly pushing those fluids up towards the fake cock. In seconds, the tip erupts with shots of fluid, a mix of your own and the liquid from the lake, the pseudo-cum showering up into the air, splattering your upper body. The sensation of cumming continues, but all of the liquid after the first few shots are absorbed by the slime, settling within its translucent mass.

As it finally rolls to a stop, the slime starts to withdraw, as you can feel it leaving the deeper corners of your brain and pussy. It exits through your ears, separating around your head to meet, and falls back down with a heavy squishing sound, directly on top of the lower half of its body. You're left gasping for breath and exhausted from the ordeal, unable to move before the slime slides a moderate distance away.

You watch as the slime starts to roll and pulsate around the semen-like mixture, and then splits directly down the middle. It seems to consume the fluid inside of it, and a second mouth splits open on the new slime, giving you an emotionless look before both of the slimes crawl back into the water.