Limestone groaned over and over again as Marble pulled her along. The two were outside heading for the cave her father had discovered awhile back. She had actually been the one to help remove some of the rock. Though she hadn't yet explored it, she had decided it wasn't worth going through at the time. Maybe during the Spring time perhaps but not near the dead of winter. Lime hated the cold. She hated it almost as much as the feelings she had been fighting against this winter that seemed to have only worsened with time. No matter what she did, she just felt tense and slightly repressed in a way.

"Come on, I promise you, this will be well worth it." Her sister spoke, saying that again for at least the fourth time. For a woman with few words, she was surprisingly talkative today. Really trying to convince the grouchy farmer down into this cave for some special. Though what could be worth going down there now then simply waiting for it to warm up a bit?

Lime shivered against the cold, feeling it bite through her coat and overalls. Her boots pushed against the deep snow as wind pounded against her. This was a really stupid idea. The cave was only going to be slightly warmer. She should be inside, maybe taking bath to try and release this damn tension.

Marble clutched her hand tightly, leading her down into the cave. Her sister was wearing a light coat and jeans for some reason. Like she expected this to be a light jog from one house to another. It was very strange, even for her.

However, as Lime got further into the cave, she began to pick up on something. Her short light silver hair was started to produce a bit of sweat. She could feel her D cup breasts begin to do the same. Even her pale looking hands were starting to feel damp. Unzipping her coat, she could now see a bit of steam wafting up along the top of the cave.

Soon the two reached the bottom, finding the cave lit up by glowing crystals and a large hot spring sat in the middle of the decent sized chamber. There was some sort of weird read plant growing towards the back of the cave, some of its stems dipping into the spring. Or maybe vines? They looked long and seemed to twitch every now and again but that could be her imagination.

Marble walked in front of her and smiled. "Well, this beats our bathtub by a long shot right?"

"Yeah, it does..." Limestone said slowly, looking around the room.

"Then lets take a dip."

Lime blushed as she glanced back down at her sister. "I don't know."

"Oh come on, we used to go skinny dipping in the pond all the time. Its not like you are going to see anything that you haven't already seen."

She was right. But still, with all these weird feeling she had been dealing with lately, it seemed like a bad idea. "Yeah but, that was different. Now..."

She eyed up her sister up and down. Marble cocked her head, her eyes staring up at her innocently. "Now? Now what? Surely you could just take a short dip with your sis?"

Limestone felt her face grow warmer as she struggled in vain to fight against those cute eyes of hers. No one could say no to those eyes, even her own thick power of will was enough to fight off the power of the Marble Stare.

"Fine..." She said at last, quickly taking off her coat. It was getting way to hot in here anyways.

Marble's eyes lit up. "Yay. Its been far too long since we last did this. I promise to even give you my famous back rub."

The slightly older rock farmer turned, trying to hide how red her face was getting. Damn why did her sister have to be so damn cute. She slowly began to tear off her layers, starting with pulling away and down her overalls, then her shirt and finally unclipping her bra and pulling down her panties. This felt so dirty for some reason even though she used to do this all the time with her family. Something about it just felt more sensual now for some reason.

She turned back, absently mindedly blocking her D cup tits with her right arm. Marble was already getting in, showing off her cute ass for a brief second as she did so. Marble could swear she felt a bit of blood run down her nose. Though again, that was most likely still her imagination.

She slowly walked forward, stopping just at the edge and testing the waters with her foot. The water was perfect. She loved super hot stuff and this was the bathtub at home on full blast, hot as it could go. She slowly got in, feeling the warm water slowly envelop her. She held back a moan of delight, this was something else.

As her bare butt sat down on the rock, finding that there was a sort of bench like break in the rock, allowing her to sit comfortably, did she finally lean back and relax. The water was now just above her breasts, making them float slightly. She felt a hand on her shoulder and glanced over, her face getting red hot again as her cute sister giggled.

"Haven't seen you look this relaxed in ages. Yet you still look tense... Do you want to talk about it?''

Yet again it was weird hearing her sister talk so much. She was always the strong silent type. When did she change? How much had she changed without her realizing?

She turned away then gestured at her back. "You'd said you would give me a back rub."

"Right." She said with a smile.

Lime felt those wonderful hands push against her back slightly and began to rotate, working out kinks she had been dealing with for weeks. As her body began to relax more, she sighed. "I have been dealing with these weird thoughts and feelings lately. I don't know what happened. Usually I can just... Use my hand and call it a day. But lately it just isn't enough. I need more than that. I feel so repressed its like I am going to go crazy."

"You need some sexual release?" Marble said softly as she worked her hands down Limestone's back, cupping them at her sides and pushing out some lower kinks with her palms.

"I wasn't going to say it so boldly but yes. I need a good hard Fu..." She paused, feeling her sisters hands tense up. "Er-I-mean, I need some good hard sex. Like screw me senseless, I have never felt so sexually tense in my life." The short haired farmer said with a bit of exasperation at the end.

Marble smirked. "Well, lucky for you, I have a friend who would be more than willing to help with that."

Lime blinked and turned her head slowly back to look at her sister. "When and where did you get a friend like that?"

"Just a few days ago. I think you are going to like them."

"Them?"

No sooner had she said this, did a few red tentacles slowly rise out of the pool. One large one next to Marble. She brought her hands back, stroking and scritching the red tentacle next to her. "I still need to come up with a name but yes, this flower here will take care of you. Don't worry, it isn't going to harm you. Just lay back and let it do it work on you."

Lime quickly stood up, taking several steps back. "Excuse me if I don't find this all incredibly weird." She said while glancing back at the large red flower. She held up her hands in defense, unsure of how she was supposed to take this. Here was her sister, just casually massaging a big red tentacle for a sentient flower offering to give her sexual release. And the weirdest part, she was considering it. Damn, she really was repressed to the max.

Any amount of fear and wonder was pushed to the back of her mind as Limestone stared at the tentacles. She couldn't believe what she was seeing or hearing right now but she would be damned if the idea of some of them working out her skyscraper levels of horniness wasn't workings its way to the top of her mind. She lowered her arms and nodded.

"Fine... But they'd better do some serious work or I am never come back here, got it?"

Marble mouthed a silent OK, slinking back and allowing the tentacles to begin their work, rubbing her shoulders and aching feet. She closed her eyes, leaning back as the massage got deep underway.

Limestone meanwhile was watching as a few tentacles wrapped around her mid section, some wrapped around her arms and two around each of her legs. Slowly they lifted her up above the pool.

She felt one run itself along her cheek before shoving its way into her mouth. She protested at first but for some reason, this forceful action turned her on a bit. Its like the creature knew how rough to be with her. Not many seemed to get that she loved it rough.

As the tentacle began to secret something into her mouth, a sweet yet spicy flavor, almost tasted like ginger, another one came up behind her. A loud slap echoed into the cave, causing Lime to let out a muffled cry. That cry was quickly replaced by a soft moan though. She wiggled her butt best she could. Oh yeah, this thing was already getting it.

Another loud slap as the grouchy farmer let out a low husky moan. Liquid was beginning to drip down her legs. She hadn't been this turned on in a long time. Two more suddenly shot up, clutching and squishing her breasts as another began to grind against her sex.

The ones around her arms pushed them behind her, holding them against her back. Another came up and pushed her forward so that she was now hovering over the pool with her face towards the wall. Another slap as drool dripped down her lip. Her eyes were blinking back the mix of pleasure and pain. She loved it. Needed it. Its what she had been craving for so long.

Suddenly she felt a tentacle force its way in, thankfully well lubed but the sudden movement caused her to lurch a bit. Then the tentacle began to move back and forth, each shove like a powerful wave of pleasure. Lime felt her vision go fuzzy as she cried out in horny lust. The one her her mouth began to work its way slowly back and forth, now going in more of a rhythm with the one between her legs. As the one in her mouth would pull back, the one between her legs would go in, deep within. It was rocking her core and senses. Liquid was pouring down her legs as she came, hard.

"HAAAaah"

She screamed out, her voice still muffled but felt the tentacle continue to pound her throat and dripping wet walls. She loved it, loved it because it kept going. She wasn't done and wasn't going to be done till she passed out from exhaustion.

She felt a tentacle grasp some of her hair, pulling it back a bit as others continued slap against her ass. Her eyes glazed over as she continued to moan like a creature in heat. Slowly, the one in her mouth pulled out, only to then release a torrent of liquid directly into her face, coating it and letting some of it splash onto her back. Limestone grinned and opened her mouth, reading to take more throat abuse. The tentacle quickly slipped back inside, soon continuing its pursuit in pounding against the back of her neck. The one in her snatch still plowing away all the while.

Marble glanced up occasionally, a first a bit worried by her sisters reactions but quickly picked up on how much she was loving ever second of this. This creature seemed to just know how to treat them. She couldn't guess how or why but she loved it all the same.

Another strange thought to her was just how little she cared about how weird this was. Sure, she had hung out naked with her family in the pond before but this was far more different. Her sister was literally just a ways above and off to the right of her, getting pounded by a horny flower. Yet somehow this seemed to matter little as she felt the tentacles rub her worries away. Perhaps it was a side effect or perhaps she truly did not care at this point. Either way, she was happy to see her sister happy.

After good hour or so past, Marble slowly got out, deciding she had been in too long. As she did so, she glanced back and watched as the tentacles slowly set her sister down next to her. She was covered in fluids and panting heavily. Lime looked like she was about to pass out. Liquid poured out of her abused moistened walls.

"So, I am guessing we will be coming back soon." Marble said with a small chuckle. She bent down and patted her sister on the back.

Lime slowly nodded, having lost her voice awhile ago.

"Good." She smiled, grasping her hand and helping her sister to her feet. "Lets get you to bed then, I have something I need to discuss with you later. After you have recovered a bit."

Lime slowly nodded again, a smile on her face. It was the first time Marble had seen her genuinely smile in years.

Author's Note

One more chapter to go. Hope you are all enjoying so far. Next one should be out by tomorrow.