Lust Sin: Episode Two
by Scott "Silvergunner" Fowler for Frazzlebot

"What the hell are you doing with my sister, Nathan?" Jack roared at us with anger in his voice. "I can't leave you alone for 20 minutes, can I Molly?" he yelled at his little sister.
Molly looked scared, confirming that we shared the dreaded thoughts that we were doomed. However, I was still able to speak out. "We can explain..." I started.
"Its simple enough" Jack replied. "You grew attracted to my sister and had buttsex with her when she said she needed some help, bypassing other options available. Simply because you wanted to" he said to me.
"...I guess so" I replied, figuring that there could have been another way around solving Molly's penis problem without having sex with her, if Jack said there was. He knew Molly better than me... "What other option would there be?" I asked him.
"Wait until another guy who likes my sister comes round" he smiled, moving closer to us both. "Looks like I was right about you Nathan" he said. "You are a complete pervert... but you are a delicate lover at the same time."
"Guess the plan worked then" Molly giggled. "You were right about him been potentially great, Big Brother" she said to Jack. "He'll be perfect for a boyfriend"
"You planned this?" I asked in amazement.
"Indeed we did" Jack replied. "Molly had the nutmeg ready when you came inside. And I was waiting in the lounge for you to finish fucking her." He looked up and smiled. "I think we'd better continue this elsewhere" he said to me. "I'm guessing its uncomfortable on the floor" he said to me.
"But what about the mess?" I asked, turning my head towards the sticky cum belonging to me and Molly which covered the floor.
"We'll clean that later. We've got important things to do" Jack replied. He reached a hand towards Molly and helped her up, before he did the same with me. He led me and her along the corridor, still in our birthday suits.
"So tell me Nathan. It wasn't your first time, was it?" Molly asked me.
“No it wasn't” I smiled in response. “How about you? I'm guessing you've had some previous experience”
"You guessed right" she smiled. "You can thank big brother for everything before" she added.
"You... have sex with your sister?" I asked Jack. This was an extraordinary claim, I thought to myself. Surely no-one could possibly have sex with their underage sister and be calm about it.
"Indeed" he said. "Me and Molly have been having sex every time mom goes out for about four years now" he added.
"You really like having sex Molly?" I asked her.
"I certainly do!" she replied. "Big Brother does all sorts of naughty things to me."
"What like?" I asked her. "Does he fuck you in the ass like I did?"
"And more" she smiled. "Big Brother likes to fuck my pussy as well as my ass. Not to mention my mouth" she said. "Some days he just licks my pussy, and I get to lick and suck on his cock. But I like it when I get fucked. I love feeling his cock shoved deep into me. I love getting filled up with his white goo."
Taken aback by her comments, I remained silent after that in deep thought until we entered Molly's room. "Something wrong, Nathan?" Jack asked him. "Surely you don't think we're weird?" he questioned.
"I'm just surprised that someone else could have sex with their little sister" I said. "Apart from me..." I added.
Both Jack and Molly were stunned by this line. "You mean... you get involved in incest as well?" Jack asked.
"Used to" I said, sitting down on the bed. "Back before things with my little sister changed" I added, feeling depression shadow my thoughts and guilt fill me once again.
"Tell me what you did" Jack said. He began pulling off his clothes slowly as he and Molly listened.
"My first time was with my little sister Amy" I said. "She was the same age as Molly here, and I was still a young teen. She came in one night and we had sex. It was a wonderful experience, making love with my beloved sister. After that we had sex one more time before we split up after an argument over friendships" I explained.
"So what did you do after that?" Molly asked.
"My best friend Chris talked to me about it, and he took me to his home. We both had sex with his little sister a few times, but I felt no love in it. It felt empty to me, so I left that behind as well" I said. "I then began to travel to try and erase my guilt, which is when I met Jack here."
"So you feel guilty from what you've done sexually?" Jack asked.
"Even now i'm regretting fucking Molly in case I hurt her" I said. "Just... memories of committing sins like that will haunt me for the rest of my life. I enjoyed it and I really did feel love towards Molly, but I still feel bad about it."
"Aww you shouldn't" Molly replied. "I felt no pain at all, just pleasure" she said, smiling. "And i'm happy you enjoyed it as well. Let go of your doubts" she added.
"I'll try" I smiled.
By now Jack had undressed, the three of us sat on Molly's comfortable pink bed, all nude. Normally I would have never thought of been without clothes in the presence of another boy or girl, but the feeling I was getting from Jack and Molly was one of friendliness and acceptance rather than the critique that I expected when they saw my less than perfect body. Or maybe it was the attraction between us all which made us feel so comfortable.
"Your sausage is all limp, Big Brother" Molly giggled, and pointed down at Jack's crotch. It wasn't erect like she pointed out, and Jack blushed as the attention turned to him. "Like some help getting it all stiff?" she asked him.
"Certainly" Jack smiled, and moved over towards Molly. She grabbed her brother's cock in her right hand and began to fondle it. Jack smiled as the stimulation made his cock rise and harden. Once it was at a decent size where she could grip it firmly, she leaned down and used her tongue to lick his shaft up and down. He moaned at the stimulation he was getting from her tongue.
Meanwhile, behind Molly I was gazing at her womanhood. It was hairless and with small lips, and was mesmerising. As if by instinct, I began to rub my fingers up and down her labia. She gasped as she felt me rub her lower lips with vigor, while she continued licking at her brother's cock. I pushed a finger between her lips, and wiggled it inside her pussy. Moaning from the light stimulation, her juices leaked out of her pussy and onto my hand. Bringing my hand to my mouth, I tasted her juices and savoured the delicious taste.
Jack began to growl as if near orgasm, when Molly suddenly stopped licking. "Not yet big brother" she giggled, and laid back on the bed.
"Why?" Jack asked, blushing and panting as his penis stood erect.
"I think Molly has something else planned" I grinned at him.
As me and Molly laid on the bed, we saw Jack now standing over us both, his cock now fully erect. It was about six inches in length, slightly longer than his sister's. Molly looked up at it. "So how about it big brother? I was guessing you wanted a turn with me" she giggled.
"Absolutely" he smiled. I moved aside as Molly flipped over onto her tummy. She positioned herself so her butt was in the air. "I've been looking forward to this all day" Jack said, pushing the head of his cock against his sister's rear entrance, still lubricated from when I had filled her with my cum earlier.
"Go on! Don't tease!" Molly said quietly. Jack nodded, and pushed his cock into Molly. She squeaked as it slid inside with a little difficulty. As Jack began to push in and out of her, her moaning increased. I was completely spellbound as I watched the two of them having sex. Molly was loving how her Brother was fucking her, and he growled in happiness at every thrust, committing incest on a major scale. However, I understood from their expressions why they were doing this - they loved each other dearly and wanted to make each other happy. Like I had loved Amy so long ago.
Suddenly Molly screamed as her orgasm hit. Her body shook with pleasure as her juices poured from her womanhood. Jack roared as he reached orgasm in tandem with her, and cum ran from her tailhole around his cock. Both their bodies shook as pleasure rocked their bodies. Eventually, as their afterglow subsided, Jack pulled out, and his cum poured out of Molly's overfilled behind.
"You must love been fucked up your ass" I giggled, seeing Jack's cum seeping out of her butt.
"Yeah, I do" Molly smiled. "But I do like it up the front as well" she said, turning around slowly so she was face up. I could see juice running from her vulva, her lips pushed aside from the force of the fucking her brother had given her.
I looked down and saw my cock was hard again, turned on from the obscene display the two of them had taken part in while I was recovering. I moved towards Molly and kissed her on the lips. I pushed my hips against hers, our chests pushed against each other. My stiff cock rubbed against her vulva as we ended the kiss. "I hope you're ready" I said to her.
"Please, fuck me as hard as you did in my rear" she said to me, blushing.
I nodded, and pushed the head of my cock against her labia. The juices from her orgasm leaked over my cock, lubricating it and making it warm. The heat of her body and the smell of her filled with lust, and I pushed forward, my cock sliding into her womanhood.
Molly gasped as she felt her tight vagina been penetrated by my cock. Despite what Jack told me about them both she was still surprisingly tight, probably due to her youth. Despite that, my rod plunged into her hot, moist pussy, before I pulled out and pushed in, fucking her. She moaned with every thrust I made, and slapped my back. I took it as a message to speed up. I did so, and she was rocked with every thrust I made, the bed squeaking with the force.
Deeper and deeper I went until my seven inch cock was banging against her cervix. My groin rubbed against her moist clit making her squeal every time it came into contact. As I felt Molly shake I figured it a sign she was close. I shoved my cock in all the way it could go, and it slid through her cervix and banged against the back of her womb. The pain and pleasure was enough to fire the trigger of her limit.
Molly screamed as her orgasm hit. Her whole body shuddered as the waves of pleasure washed over her body and soul. Her juices filled her pussy, and squirted around around my cock. The tightening triggered me as well, and my orgasm hit. Pleasure surged through my body like lightning, and I unloaded my cum into Molly. My cock sprayed it deep into her womb, flooding it and making her belly expand from it.
I gasped as the afterglow filled me, and hugged Molly as she laid on the bed experiencing her own afterglow. "I... love... you" I murmured to her, in-between deep breaths. She nodded and kissed me on the cheek.
Jack smiled. "You really did make her happy, Nathan" he said to them both. He sighed. "I really need to use the bathroom" he muttered to himself.
"Me too" I nodded. "But i'm too tired to get up"
"Why move from where you are?" Jack smiled and moved closer to them both. "I think you know Molly likes been filled up with cum. Did she mention what she also likes been filled up with?"
"You mean..." I started.
Molly giggled. "Go ahead Nathan" she said. "Relieve yourself in me!"
I really did feel this was not a good idea, but at this point I could not hold back any longer. I smiled, and let go of my discomfort. Pee spurted out of my cock and filled Molly's womb alongside my cum. I sighed as I continued to piss away my discomfort as Molly's stomach bloated from the yellow water flowing into her. The warmth of the liquid surrounded my cock, as Molly giggled, obviously feeling the same liquid within her. Eventually I was expended and finished peeing inside her, my cock still inside her bloated womb.
"I love it when i'm filled with pee" Molly giggled. "In both places, that is" 
Jack grinned and moved behind her. "Hope you're ready" he said to Molly. She nodded, and Jack shoved his cock into her butt. She sighed as she felt her stomach expand more, and I figured it was due to Jack peeing inside her backside. Jack finished quicker than me, and smiled. "Told you she likes been used like that" he said.
Jack was the first to pull out of Molly, moving away from her as his cock popped free of her backside. She gasped as out of her backside came a mixture of her brother's cum and his pee, soaking the bed and staining it white and yellow. "You made me make a mess, big brother!" Molly giggled as the last of her brother's fluids left her.
"My turn" I smiled. I pulled away from Molly, carefully sliding back my cock through her cervix out of her uterus. As her cervix closed, I withdrew myself from her pussy, my cock coming free with a small pop. Out poured the cum and pee I had expended into her, her stomach deflating as her womb slowly emptied itself. "I'm all empty now" she smiled, gazing at us both.
A look of surprise came over her. "Oh, I almost forgot one more place" she smiled, and sighed. She raised her parted vulva in the air and her urethra quivered. Her pee suddenly shot out of it, spraying all over mine and Jack's legs. I was shocked at first, but on seeing Jack enjoying it, I stayed put and watched Molly continue pissing away her discomfort. The warmth covering me felt really good, yet I didn't know why. Eventually her bladder emptied, staining the floor and our legs with her golden rain.
As Molly laid back on the stained bed, me and Jack got onto it alongside her. We both kissed her on her cheeks, and she returned the kiss to each of us. We moved closer and hugged her, all smiling.
"That was fun..." Molly said. "I can't thank you two enough for that"
"It was our pleasure" Jack replied. "I'm hoping your new boyfriend liked it as well"
"Wait. What do you mean 'new boyfriend' anyway?" I asked Jack.
"Me and Big Brother have been wanting a friend to take part in sexual activities with us" Molly explained. "We thought that my eventual boyfriend would be perfect for such a partner. The man who loves me would take care of me and please me as well..."
"So how about it Nathan?" Jack asked me. "Do you really like Molly?"
"I absolutely fucking love her" I replied, and kissed her on the lips.
As Molly returned the kiss, Jack chuckled. "I'll go and clean things up downstairs while you two cuddle for a while" he said to us both. "You both look like you need some rest after so much sex today."
After that day, everything changed for us. Me, Jack and Molly became incredibly close friends, and spent a lot of time together. Me and Molly were both very horny, and had sex almost every time we met up. Whenever it was at either of our homes, in the park behind the bushes, in a bathroom at an Art Gallery, or sneakily in the cinema, we had so much fun together fucking each other until we were exhausted.
Jack liked getting involved as well. Molly always loved it when we both fucked her at the same time, filling her up with cum. And sometimes I even gave both of them a blow job when Molly used nutmeg. The sexual adventures we had were almost limitless.
It was one of those times on a day a few weeks later. We were in Molly's room, and Jack was watching me fuck Molly's pussy. He had recently had the idea of painting real life models in action, which meant he was painting on a canvas as I was thrusting in and out of Molly, both of us moaning in pleasure. He had a sly smile as he painted one-handed, another hand stroking his cock as he watched me fuck his little sister.
He put his palette down and stood up. "I'll be back in a moment" he said to us. "I need to get some clean water for my brushes". We paused for a moment as we watched him walk out the door.
"Its really fun when Big Brother includes us in his Art" Molly giggled.
"It is actually" I agreed. "Its just like that portrait me and him were looking at when we first met. That crude copy of the Birth of Venus. I think I now understand the meaning of it..."
"What was the meaning then?" Molly asked me.
Suddenly and before I could answer, we heard a short yell of surprise. Jack suddenly dashed back in and shut the door quickly. "Get dressed quickly!" he gasped. “We're in trouble!”
"Why?" Molly asked, still impaled on my cock as I paused from fucking her.
"Before we're discovered by M...” Jack started, but was cut off by the noise of the door opening. In the doorway stood a woman of medium height, looking angrily at us. She was of slightly tubby build, rather similar to Molly.
"What on earth are you doing to Molly?" she yelled at us all. "And why are you all without clothes?" she yelled to all of us.
I thought been discovered by a fellow teenager was bad. By an adult... things were turning out really bad.
 
- The End -