You step in something slimy

Before you are able to answer, you take a step only to find yourself... Stuck? Looking down, it wasn't hard to discover why. A pool of blue liquid was wrapping around your foot, and slowly spreading upwards. Perhaps it was the shock, but you found yourself unable to to make a sound as it continued up, and under your clothing. At the same time, it began to grow upwards, steadily forming into quite the buxom woman.

It didn't take long, merely a few seconds, until she seemed to solidify. Her body was opaque, not quite see-through, though you did notice what seemed like a sort of small red ball floating around inside her. She didn't make a sound, merely stared at you with a hungry grin, and the slime that was sliding up your leg seemed to finally reach its destination. You could feel it ever so teasingly graze against your balls, almost like a tongue.

"Grace!" your guide yelled out, shaking you out of your stupor. "You know better, stop antagonizing our guests."

With a soundless sigh, the slime girl retreated, but not before giving your genitals one last little stroke. You don't think the guide noticed her menstruations, but you turned a bit so he wouldn't notice your tenting pants anyways. Which, incidentally, meant you were facing it directly towards the slime girl. She certainly noticed your arousal, and gave you a sly wink before melting down and sliding away towards a nearby pool.

Your guide glared after her for a moment before turning back to you. "Sorry about that, Grace has been a resident here for a while. As a slime she doesn't have vocal cords, and slimes in general tend not to be the brightest of creatures. After having been here for so long without being chosen, she's picked up some bad habits. In fact, soon she will have reached her time limit and will have to be sent back."

"In any case, there is still plenty to see, shall we continue?"