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TABOO SEX STORIES

A Sippery Accident

A Sippery Accident

by orion_asyr
15 min read
4.4 (24500 views)
adultfiction
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"This is going to be exciting!" Mark was smiling over his whole face. They were finally visiting the newest and biggest Aqua Park in the world. He followed the construction of this megaproject since it was first announced seven years ago. It was something else. The whole Park was themed around a lost tribal high culture on a volcanic island. The resources behind this project where mind boggling, but it seems like the billionaire's of today can't be stopped with their prestige projects.

If Mark was honest to himself, he didn't care. What he cared about was the crown jewel of the park. The longest and wildest water slide in the world. It was going down and through the inactive volcano.

His parents won four tickets in a promotional lottery. They were happy to spend some vacation time together. The last year's had been pretty busy for them.

But for his part. Man he could not wait to experience this new wonder of the world.

"Everything packed John?" His father shouted through the hallway.

"Yeah, yea... give me a few more minutes, John is calling!"

"... What do you mean the doctor said no? Come on boy, you can't betray me like this. We waited for seven years!"

Angelica, Mark's mother, walked down the hallway with the rest of her luggage. There was her son sitting on the bottom of the stairs, shoulders down, both his hands over his face. Angelica took a deep breath, kneeled down and rested her right arm on Mark's shoulder. "What happened?"

"He can't come with us. It is his leg injury. His doctor said the risk is too high." It was just pure disappointment on Mark's face.

"It's Ok Mark. I will call your sister. I think you two have to spend more time together anyways."

"Wow, what a great replacement. You could also ask the Goblin living in the local cave."

"Don't be so rude Mark, do you even remember how she looks like? You will have an exciting time together. Trust me this vacation will be unforgettable." Angelica smiled gently at her son, took her luggage and went straight to the car where her husband Robin was already waiting for them. "Call your daughter! Tell her she's coming with us. John just cancelled the trip."

Robin knew his wife well enough to not ask any further questions and got his phone out.

"Hey darling, how are you how are your studies going?" Angelica looked at him and pushed her eyebrows up. "Good to hear... Anyways John cancelled the vacation and your mother thinks you should come with us... Ok, that was easy. We will be at your place in two hours."

Angelica was pleased. She shouted: "Hurry up Mark we are leaving!"

Alice could not believe it. Like a genie granted her a wish. She was beyond excited.

She had been so angry about her family going to vacation without her. Damn she felt completely excluded. Since she left home for college last year, at her twentieth birthday, it felt like she was not even part of the family anymore. Yeah, college life was great but she still missed the comfort of home and family. Alice smiled, she could not wait to annoy her stupid older brother. And that island actually sounded great. She could work on her tan for a whole week. Cocktails, sun, hot boys. Everything she needed right now.

"Alice, you had two hours to prepare. We are just gone for a week not a month. What is all that stuff?"

"Alright, Alright mom this is all. Hello to you anyways. Happy to see you too. Ohh and my wonderful brother, what a blessing to spend time with you again!" She pocket Mark in his stomach while smirking.

"I told you guys we should have taken the local goblin with us. Would have been way less trouble" Alice stuck her tongue out to her brother and of they went.

"This place is wicked!" Mark shouted, his mouth wide open. And indeed this was a side to behold. The hotel was completely themed. He had never seen anything like it. It looked like an ancient elven palace. Carved of the finest wood. Ornamented with great detail. It was magical.

Their parents did the check in, they went up the elevator. "The rooms supposed to have a balcony with direct view of the Aqua Park!"

"Mark you sound like a little kid. How old are you now 24? Shure you are not ten?"

"Mhh yeah my little sister all grown up now that she goes to college. Still a baby to me though!" If Mark was honest to himself Alice did grew up a lot. The last time he saw his little sister was three years ago. She looked good, like a woman. Actually really attractive. 'What the fuck are you thinking?' Mark lost himself in his thoughts.

"Knock, knock!" Alice tapped his head with her knuckles. "Are you done checking out your sister?" She smiled, "seventh floor let's get to the room."

"Wow the view is even better than I thought. Look at that slide. It is absolutely ridiculous. I am so fucking hyped!"

"Yeah I can see that. There is only one bed Mark!" Alice looked at him with this demanding face. She copied that from their mother.

"We can fix that problem in the evening, don't worry. Let's go to the park. I can't wait!"

"Easy boy. I still have to change and order my stuff."

"Ok, ok I am waiting in the lobby. Hurry up!"

Mark was amazed by the details of the theming. It was all so beautiful. The artworks, the furniture.

"Ready to go as I see, your mother and me will be sunbathing next to the great pool just join us when you had enough adventures. We will have everything you need at our place. Have fun!"

"Yeah see you later dad!"

There she was finally. Alice was wearing a yellow bikini. The bottom was tied together by two ribbons on each side. 'Fuck she looked sexy, she must workout in college. But why should he care, good for her.'

"Let's go! I don't care about all the other attractions for now let's go directly to the great slide!"

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"Mark I am just here for my beech vacation. I just want to chill and tan."

"No fucking way Alice. I told you in the airplane you can only ride it with two people..."

"You told me a thousand things, something about a secret cave in the slide, the longest and highest on earth, bla bla bla. You are really annoying Mark!"

"When did I ever ask anything of you Alice? Common just this one time!"

"If this is what it takes to shut you up. Let's go!"

"Fuck yes!"

There was a tilted elevator going up to the top of the volcano. It was quite the attraction on its own.

"Ok this is way higher than I thought." Alice shivered a little.

"Don't worry little sister, I am here to hold you." Mark put his arm around her. Alice pushed him and turned away from him. He looked at her ass for a moment 'wow she really is hitting the gym, holy...' he felt a light tingling 'what the fuck is wrong with you Mark?' he thought to himself 'whatever let's have some fun.' The elevator stopped and they moved out to the top of the mountain. This was beautiful, what a view!

Mark lay down onto the rubber ring and spread his legs so his sister would fit. She stepped through the flowing water and lowered herself onto him. "Could you..."

To late! The Lifeguard pushed them down the tube. Mark wanted to tell his sister to move a little bit, but now they where already part of the action.

She had placed herself directly on his lap! And 'wow' her ass was not just looking good in that bikini. She felt so soft!

The ride started instantly. A big drop followed by some harsh turns. Mark intuitively put his arms around his sister and through the action didn't realize he was grabbing her boobs. A few more harsh turns and the tube opened up. They were getting slow now. This was magnificent. You could see all over the island from here.

"Ähm Mark, what are you doing?" Alice asked with a grinning tone.

"What?" This is when he realized he had his sister boobs in his hands. Wow they felt amazing. "Holy Sh.." he rapidly moved his arms to the side 'what the fuck am I doing?' he wondered.

"Well I guess we are of for a good start!" Alice laughed.

Both were silent for a moment. Just enjoying the scenery. Than suddenly the ride picked up pace again. Sharp turns and drops followed and Alice was sliding from side to side in Mark's lap. Her ass was rubbing directly over his cock and Marks body started to respond.

'No, no, no! Fuck!' his mind was screaming. One more huge drop and they landed in a big pool.

It was unreal. A waterfall flowed in on one side and the other side was a massive class wall. You could see the entire Aqua Park. People where just chilling in their rings and floating through the pool. Once in a while one of them was sucked down the next part of the water slide.

Alice was moving her butt from side to side. "Well this is an unexpected compliment!"

"Please Alice stop it. You are not making it better!"

"I could just stand up. Would that help?"

"Yes, but everybody will see my boner. People will be creeped out. Not a good idea!"

"Guess I have to stay then."

His sister kept on moving from side to side and massaging Marks dick with her soft cheeks. "Alice!"

"Is there a problem big brother?"

"Sto..." They where sucked into the slide.

This part was way wilder than the first one big drops, crazy S-turns, and even some ascensions. They were shaking and through all the movement Mark's dick slipped out of his swimming trunks. Again he didn't realize it at first but it settled right between his sisters legs. Directly on her pussy.

There was a short slower part and he could have sworn Alice was squeezing his dick with her thighs. Than came on last big drop and they entered the mountain into a cave.

They where floating in a second pool now. It was dark and the sounds of people's voices echoed through the foggy air. You could not see much but everything looked so elemental. It was awesome.

The full magnitude of the situation came back to him when he felt his sister hand touching his cock. "What the fuck happened?" Alice kind of whispered in his ear.

"This is a problem" Mark was completely overwhelmed. He was exited from the ride, his mind was going crazy because his dick was out and it was touching his sister pussy!

This was so wrong. Fuck! He needed to fix this. Quickly! "Why are you still touching it Alice? This is not funny anymore!"

"I am covering you. Idiot!"

Holly fuck this was a crazy situation. It felt like he was losing his mind. Then Alice started to push his dick down. Mark though it was an accident but she did it again. His sister was gently moving his dick on her pussy. His mind was getting foggy. Was it the cave? Suddenly he felt is cock, he felt it moving. He could feel the warmth of her pussy. He had never been so hard before. Something flowed through his body, an energy. He felt so good. Then he smelled her. It was the sweetest thing, intoxicating. He moved his hands on her boobs and started to massage them.

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Then it suddenly hit him. This was his sister! And they were in a public water slide! "Alice! What the fuck are we doi..."

Out of nowhere they were sucked into the slide again. It was all dark now. Laser and light effects brightened the tube. Quick movements, than a moaning in his ear.

The ribbon on Alice bikini bottom had come loose. More quick movements, lights, fog. Then a slow part. Mark's dick was now touching his sister's pussy directly. He could feel her wetness, he could almost taste the sweet smell of her juice. Then a huge drop directly into a twister. An Ascension, the splash of a water fall.

They were floating again. Around them a crystal covered cave. Dripstones from the ceiling. Mark had a short moment of clarity "This must be the secret cave! Unreal!"

"Mark..." Alice whispered, moaning in his ear.

Than he felt everything again. His dick between his sister's pussy lips. The lust burning in him. The shock of the waterfall had brought back his mind for a moment.

'What am I doing. Fuck. We need to stop this!'

Unexpectedly Alice began to slowly move her bottom. His dick was now sliding through her lips. Alice moaned softly moving a little faster. The head of his dick was rubbing her clit. She was dripping. The last bit of sanity left him and he started to move his hip. He was lost in this moment. The shimmering crystals, the sweet smell of her pussy, the softness of her tits.

"Mark please..." he lowered his body, now opening her lips with his dick.

Mark pushed upwards. Slowly, holding his sister with both of his arms. It was paradise. The warm softness of her pussy engulfed his cock. He entered her. He felt her.

His dick was now completely in her pussy. Alice moaned deeply. She grabbed Mark's hands on her tummy. He began to move. With a rhythm slowly first than faster. Holding his little sister, feeling her, squeezing her boobs.

Her pussy was pulsating pressing against his dick. Alice moaned loudly now.

Than Mark stopped. He put his feet in the shallow water, stood up and pulled his sister with him in one move. Alice was surprised, but she had no time to react. He carried her to the side of the cave and bend her forward. Alice rested her hands on a rock. Her lower back was curved downwards. Mark positioned himself behind her. Alice ass was perfect. Round, soft, tight. He slapped her. She moaned.

Than he put his dick on her entrance and rammed forward. He entered her so hard she screamed.

Than Mark stated fucking her, he started fucking his little sister. He was fucking her hard. This soft pussy. She was dripping juices, screaming ecstatically. He slapped her firm ass. Fucked her harder, her pussy coming hard on his dick.

Then he lowered his pace. Grabbed her soft tits and pulled her up. He was still fucking her slowly while massaging her boobs. Then he pulled out.

There was a small hole in the wall, almost like a bench. Mark took Alice and lowered her on the stone. She was now lying on her back looking at her big brother.

Mark entered her slowly while looking his little sister directly in her eyes. It was magical. Her eyes looked like the most beautiful gemstones. She felt unbelievable. He moved in her slowly, gently feeling every sensation.

Then Mark hugged his little sister, now completely connected. He fucked her faster feeling her soft pussy, hearing her moans in his ears.

It was to much for him. He felt his balls tightening and an electric feeling through his dick. Now he moaned while his cum shot deep into the sweet pussy of his little sister. Stream after stream he emptied himself into her. Alice coming on his pulsating cock...

Mark came back to his senses. Seeing is freshly fucked sister beneath him. Her checks were red. His dick was still in her.

"Ähm, yeah fuck. What happened?"

"You fucked me Mark!" they both had to laugh.

"Well as nice as your dick feels inside of me, I think we should get out of here."

"Are we cool though?" Mark ask while pulling out.

"Let's say it was all a slippery accident."

"Yeah it never really happened. I did not really feel in control anyways."

"It's fine Mark. I am not angry. It will stay our secret."

"Thank you Alice, let's get out of here!"

They quickly cleaned themselves, Alice put her bikini bottom back on and they went back on the ring.

It was only one last drop into the twister. Then they landed in the big swimming pool.

A lifeguard took the ring and they swam together through the pool to the other side where their parents were sunbathing.

"Hey the adventurers are back! And how was the wildest ride on the planet?" Angelica smiled at them.

"It was orgasmic. You should definitely try it"

Mark winked at Alice. His sister smirked and shook her head.

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