Venus and I began running in the direction of that scream. It was not a long drawn out screech, but rather a quick loud sound that dissipated as soon it was uttered. Because it was so brief, we could only guess at its general direction, but that we seemed to be in agreement about where it had come from gave us hope that we were headed towards it.
I think it was while I was running that I realized there appeared to be some sort of path through the whole place, and also, that the cavern was separated into distinct areas. The area we had left had been populated by a sporadic number of alien creatures. We soon found ourselves running into a different area, where the 'vegetation' was a lot lusher.
I use the term 'vegetation' loosely here, and I had no doubt that the alien creatures here were no less threatening to Venus' virginity, given their physiology: Long thick stems topped by large pink bulbs; tendrils of different lengths and widths coiling and uncoiling as we ran past.
I tried to keep Venus running on the centre of the path because I didn't want her to be grabbed by one of these creatures. By then, I could already see what it was these things did to young women.
Just ahead, we saw Angie, the young helper at the canteen I regularly went to. Angie is the opposite of Venus: Small and slender, with slim hips and fair skin, and hair cut into a short bob, she was really quite a cutie and rather popular with the boys on campus... as well as the older men working in that same canteen. She usually wore a tee-shirt and shorts, along with a white cap and a cheerful smile.
Not even that smile was present on her when we finally got close enough to see what was going on. From a distance, all I saw was a white, wildly twisting body, seemingly entangled in a web of some sort. She was struggling so much I couldn't even tell which were her legs and arms.
As we drew nearer, the picture grew clearer. Angie had become entangled in one of those massive plants, her limbs held apart by thick tendrils. Apparently, she had already been 'anchored', because I could see a tendril as thick as my arm embedded in her ass. The alien had also been taking liberties with the nubile young girl -- her pink vulva was glistening with juices -- but that was not what stopped us both short.
As we got nearer, we saw her body being lifted so that she was held horizontal to the ground. To our horror, the alien plant began drawing her legs further and further apart, exposing her privates to our eyes. Then, as her labia slipped apart to reveal her wet hole, the oversized bulb lurking just below her vagina plunge right in.
Angie jerked as if she had been shocked. I could see her thigh muscles strain to close her legs to prevent the alien penetration, but it was all futile. Venus gasped as she watched the girl's pussy spread wide and slide shut behind the bulb that was pushing into her trembling body. "Oh shit!" she exclaimed, and stopped in her tracks. Perhaps the memories of her recent escapes from alien rape were still haunting her.
I was unburdened by such concerns, so I continued moving towards poor Angie. It looked like the thing had fully distended her sheath -- I could see her flat stomach rippling with the movement of that bulb deep within. Then I saw her white thighs shivering as if electric currents were running through her, and realized that she was coming. As if to confirm my assumption, copious amounts of liquid began flowing out from around the stem protruding into her pussy.
I stopped for a moment when I was just a few feet away from her bulging vulva, wondering if the damage had already been done. Should I try to save Angie and risk Venus' and my safety? Or should we just continue on our way and try to ignore the weakening struggles of the girl being fucked by the alien creature?
Venus seemed to read my mind when she called out "What are you waiting for? Help her, Mike!"
With that encouragement, I waded into the plant, hoping that it did not have similar designs on males of my species. There were a few uncomfortable moments when some of the tendrils ran up my legs, but they seemed to be greatly discouraged when they touched my balls and fell away instantly. Really, though... they were feathery and soft, and didn't help my raging erection at all.
When I reached poor Angie's body, the thing had been inside her for some amount of time, and because I couldn't see her face, I couldn't tell what her reaction was. Reasoning that her scream and the struggles we saw were good enough as evidence of her unwillingness to participate in this congress, I decided to pull the thing in her ass out first.
I don't know why I decided that way... maybe I felt that what went in first should come out first. Anyway, I yanked that sucker out, noting how her asshole was clutching tightly at it as it slipped out. Apparently, her orgasms were still going on. Having the plug in her butt removed seemed to galvanise Angie though, and she began struggling with renewed vigour. "Help! Help me!" she screamed. Obviously, this plant did not paralyse its victims. "Please... help!"
At that point, I heard Venus yelling behind me. "Stop! Don't! Stop that! Mike!" It didn't occur to me to question why she would ask me to stop doing what I was doing when she was encouraging me earlier, but it made me hesitate enough for me to see two lumps sliding quickly up the stem, and push past Angie's helpless vulva into her body.
"Shit! I can't stand by and watch this," I thought to myself, and reached out to pull the intruding prong out of Angie's pussy. I didn't know why Venus had wanted me to stop, but I couldn't just let this go on. Not with this poor young woman begging for help right in front of me. As I pulled it out, I noted the extent to which Angie's reddened vulva lips had to stretch just to let it out. The girl was certainly able to take it.
It was so big I wasn't surprised to hear her gasp as the widest part of the bulb passed out of her, leaving a gaping hole that quickly recovered and disappeared behind a once-more demure pussy. It was a nice one too... Angie's pussy, I mean... not too hairy and an 'inny', just like Venus' -- not for me the thick pouty inner labia that some women have.
But I digress. As I pulled the bulb out of her, there was a deluge of vaginal fluid that exploded out of Angie, hitting me on the chest. I think she must have felt the sudden emptiness down between her legs because she started struggling even more. Her legs were flailing even more wildly and I was almost kicked a couple of times before I managed to grab on to the vines holding her legs and pull them off. The white flesh of her thighs was soft and smooth, almost creamy to touch, and I can't say I didn't enjoy holding on to her thighs as I pulled her towards me, away from her alien attacker.
I was finally able to pull her out of the mass of tendrils to safety in the middle of the rough path Venus was on. I say 'was' because Venus was no longer on it. Apparently, she had called out to me for help for herself and the scream to 'stop' was not directed at me, but at the alien currently attacking her.
OK, this one was quite different from the previous aliens that had attempted to take advantage of her. This alien had several fist-sized bulbs surrounded by needles on the ends of some very long tentacles. It just simply looked nasty, and it had my Venus in the grasp of its many smaller tentacles.
At that point, I was already a little winded... the fight with the alien that had been fucking Angie in the ass and pussy had taken quite a bit out of me, and I didn't know if I had the strength to get Venus away from her attacker. To her credit, she appeared to have put up a good fight, for it was only as I was panting on all fours, trying to catch my breath that I saw what the alien meant for her.
Turning her around, the plant thrust out its largest bulb, which extended its needles. I watched as her buttocks were pulled apart and the needles inserted into the flesh around her anus. She yelled, struggling harder to break away from it, but the plant was relentless. The needles spread outwards, pushing her anus apart and opening her up in preparation for penetration. Once more, I got to see Venus' cute pink anus yawning wide. Her ring was twitching in a vain attempt to hold keep her rectum safe, but her ass muscles were no match for the alien and its needles.
I felt rather than saw Angie suddenly throw herself forward, reaching for the probe intended for Venus' rectum. That action stirred me into motion, and I jumped towards the plant, trying to pull its prong away from the gaping maw of Venus' asshole.