Wade through

The water was white and murky, and reminded the couple of the rumors about the sperm lizards white swamps. Could they have stepped in their territory?
The prospect of a strong opponent sounded good and the worth of their demonic cores was high, though even a single lizardman would most likely be too much for Ren to handle on his own... not to mention about the rumor about girls getting pregnant just by getting close!

Well, it was most likely an exaggerated rumor and there was no lizardman in sight so... they couldn't back out just because of a few rumors, could they?
Mei could go alone to scout, but considering Ren's current strength it was safer to stick together. But for Mei to bring him along as she jumped over, it'd be taxing for her already damaged cultivation and since they would have to rely on her to fight those lizards... it wasn't wise to waste energy before the fight even began.

Can't retreat, can't leave Ren alone, can't waste energy.
The only solution to go together without wasting energy would be to wade through this white pool.
They didn't know if this was really one of the white swamps typical of the sperm lizard's territories or just a particularly coloured murky water, but even if it was the former... despite the many nasty rumors, at worst it'd be just tainted water.
Even if the lizardmen really did dump their cum in there, could it really knock Mei up if nobody poured it in her pussy?

If those nasty rumors were true and those pools were entirely made up of lizard spunk... the prospect of bathing in demonic cum felt disgusting for both, but how could someone cum enough to create a literal pool? Even if they kept at it for days and do so in groups... there was no way they'd cum enough to fill not one, but supposedly so many of white swamps dotting their territories... yup, no way, at most they dumped some in an already existing pool.

Both didn't know enough about the Sperm Lizard Tribe, they didn't know those Lizardmen could and would really cum buckets multiple times at day and this pool was indeed filled entirely with semen... and not just any semen, but semi-sentient swimmers waiting for some pussy to crawl into!
The "water" was already stirring from Mei's presence, and unknown to her some stray swimmer out the pool was already sneaking up her leg aiming for the final prize!
It was too small to be noticed unless someone was purposefully looking at it and by the time Mei stepped on the shore of the large pool it also reached her lower lips, Mei's panties barely counting as an obstruction as it slipped past and then dived into her hole.

It was very faint but she did feel as if something was wrong, as if her pussy was tingling, as if something was crawling inside... however it was too faint, and it felt more like a foreboding feel towards those murky waters she was about to immerge herself into.
Her intution was right, this was just a foreboding of the threat her womb and ovums were in if she really stepped in there, though the foreboding was just as dangerous as the threat itself as that lone swimmer popped through her cervix and was now free to roam inside her uterus in search of eggs to fertilize!
She didn't even step in the swamp and was already inseminated by some leftover sperm.

The couple stepped in those murky waters, and felt they were much denser and sticky than expected.
It almost felt like the water was squirming around their feet... was this some form of quicksand? But it was too easy to pull back, so there was no way this was some sort of natural trap.
And since it didn't look lethal or even dangerous... they looked at each other and once again stepped forward, this time not stopping and continuing to walk deeper into the pool.

To the ankle, to the knee, to the tight... the water was almost to their waist, and Mei felt like the water rippled way more than it should when someone walks through... was it because it was denser? This was no common water, so it squirmed more when people passed by?
Hopefully it won't get any deeper, she really didn't want to dip her pussy in this murky swamp...

Her hopes were dashed a few steps later, the pool grew deeper and soon enough even her tits ended up sumberged... she could feel the ooze clinging to her whole body, and it was disgusting!
Moreover it felt like there were active water currents below... how could this be flowing water? Was it connected to some underground stream? But if it was, why was it still so murky?
Mei couldn't make head or tails about how this tainted pool worked, and since she could she decided to just forget about it and hurry her step, unwilling to stay in there for even a second more.

But ignoring the situation sure didn't make it better... she could feel the ooze seep into her clothes, cling to her skin, gush into her pussy!
Yes, it was almost like those water currents were directed straight at her pussy, and much to her disgust she felt as if it was getting into her lower holes. Was it just a feeling or did some really seep inside?
Little did she know... below the waters there weren't any currents, but gallons of semi-sentient swimmers rushing between her legs and indeed aiming at her baby-maker.

Some strayed into her anus, but most of them got the right hole and her panties barely offered any protection... if anything, the piece of cloth slowed the rush enough for Mei to not notice the sheer amount of sperm crawling its way into her pussy... she did feel some tingling and occasional slimy feel seeping deeper, but her level of wariness was too low to understand just how bad was the situation!
Even worse, with all those swimmers crawling their way up her pussy there was no way they wouldn't be rubbing themselves against her sweet spots on their way to her womb... individually the stimulation was faint, but as more and more sperm flooded in...

Mei could feel her body getting warmer, and her private bits tingling more and more... was something wrong with this water?
After all it was something peculiar to demon's territory... could it be it had aphrodisiac effects? However they almost crossed half the pool, it would be stupid to turn back now... but she was also getting more and more horny...