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Crossing Lines

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"I'll be quiet. I promise. Just don't stop." She begged. With that he shoved his face back between her legs and his tongue went back to work.Shelly sucked on her lower lip, fighting the urge to moan as his soft, hot tongue circled her aching hole then lapped up her dripping lubrication. He traced his way up to her clit, making her bite down on her lip when he pressed his tongue down firmly over her clit and shook his head gently back and forth.

He worked his tongue around her pussy until she was soaked and shaking then sat up high on his knees and pulled his dick from his pants. He entered her smoothly and easily. He thrust into her as he lifted her shirt and buried his face in her bare breasts. He sucked her left nipple into his mouth, getting it hard then teasing it the same way he had with her clit. She quietly panted, her whole body shook as orgasm ravaged through her, tightening her muscles around his thick shaft and making him push harder inward as her muscles pushed him out. She felt his cock expanding inside her, letting her know he was about to cum too. She pumped her hips into his, trying to help get him there.

"What the fuck is going on here?" Their Dad's voice boomed from the bottom of the stairway.

Shelly froze instantly, terrified. Her heart pounded in her chest. Her brother's cock throbbed in that moment just before Dad started talking, she'd felt it happen, she'd felt it begin to spit inside her. It was too late, nothing would stop it now but Steve stopped moving, his face instantly draining all color. He pushed away from his little sister but being mid-orgasm his body didn't respond to his mind. He fell backward, landing on his butt. His cum still shooting out of his hard cock. Shelly watched in horror as he finished cumming, shooting thick, stringy globs onto the living room carpet and his pants. His dick gave one final throb, pushing out the last, sad blob of cum that dribbled down his length. As soon as it was out of him, he went limp and his face burned red.

"What the fuck did I just see?" Dad looked down at Steve then over to Shelly. "Cover yourselfs up." His voice was more hushed this time. Anger and disappointment dripped from his words.

Snapping back to life, Shelly tugged her shirt down and fixed her shorts as she sat herself up. Steve pulled his wet pants over his limp prick and sat himself up also. "Daddy I'm sorry. I'm sorry it was my fault." Shelly cried. Tears instantly streaked down her cheeks.

"Shut up." He growled. "Shut up."

"Okay, Daddy. Okay I'm sorry Daddy." She blubbered.

"She's your sister! Your LITTLE sister!" Dad's voice growled again, this time directed at Steve. "What are you fucking doing to her?"

"I... I don't... I... didn't" Steve failed to find any words that would explain what he was doing.

"How many times?" His eyes glowed with fury as he looked between the two of them. "How many?" He repeated.

"I.. I... I don't know." Steve managed.

"It's my fault Daddy, I made him." Shelly said softly.

"Go to your fucking rooms. I don't want to hear any more. This never happened and your Mother is Never to find out about this. Never! Do you understand me?" He waited a moment. "I said, Do you fucking understand me?" Shelly and Steve nodded in unison. "If this ever happens again I'll make you both regret it. Now GO!" His final words were growled so low the two could barely understand him but they knew what he meant. Shelly was on her feet before Steve but they made it to the hallway at nearly the same time. They scurried into their rooms, shutting their doors at the same time.

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AlwaystabooAlwaystabooabout 4 years ago
Very sensual

The love they shsre blossoms during sex

Asterisk69Asterisk69about 4 years ago
I hope your're not going to involve mom or dad into this

I hope your're not going to involve mom or dad into this

Longing4DesireLonging4Desireabout 4 years agoAuthor
More to come

Hello and thank you for the comments. I've taken them all into consideration as I craft the continuation. This first part was taken from a much longer story I had already written, so no, the story is not over :) However I am giving it a good rewriting because my original just doesn't serve this duo justice.

thedayafterthedayafterabout 4 years ago

Good story with lots of potential for a followup chapter. Shelley and Steve haven't talked about their relationship with each other or where they want it to go. With Steve going off to college and Shelly staying at home it seems like there isn't any mileage in their relationship.

Having been discovered by their Dad it seems unlikely that Shelly will be able to follow Steve and go to the same college as him or even accompany him to the college for a visit when he leaves.

Perhaps the author didn't intend to continue this story and the ending of the of story, with Dad discovering them, leaves it up to us to imagine the obvious ending where Shelley is forced to go to the local college and remain at home keeping her separated from Steve and thus not allowing their relationship to develop beyond a sibling one.

Hope that isn't the case and we get another chapter where Shelly and Steve's relationship is allowed to develop.

Gave it 4 stars only because, from my perspective, the story hasn't finished.

thedayafterthedayafterabout 4 years ago

Good story with lots of potential for a followup chapter. Shelley and Steve haven't talked about their relationship with each other or where they want it to go. With Steve going off to college and Shelly staying at home it seems like there isn't any mileage in their relationship.

Having been discovered by their Dad it seems unlikely that Shelly will be able to follow Steve and go to the same college as him or even accompany him to the college for a visit when he leaves.

Perhaps the author didn't intend to continue this story and the ending of the of story, with Dad discovering them, leaves it up to us to imagine the obvious ending where Shelley is forced to go to the local college and remain at home keeping her separated from Steve and thus not allowing their relationship to develop beyond a sibling one.

Hope that isn't the case and we get another chapter where Shelly and Steve's relationship is allowed to develop.

Gave it 4 stars only because, from my perspective, the story hasn't finished.

linnearlinnearabout 4 years ago
Don't Make Me Beg

Soooooooooo unbelievably hot. Please continue, you can't leave us hanging.

RockyMountainHighRockyMountainHighabout 4 years ago
Need More

Good story, I would like to see if Dad changes his view, and if Shelly helps Steve move, and I could go on. Hope there's more!

horny2doithorny2doitabout 4 years ago

Yes, a very hot story with so much potential !! Baby sis has big boobs, sexy legs, a nice butt and is so horny for her brother big cock ! Her brother being horny like baby sis; hopefully will get a chance to bang her long and hard without fear of Mom or Dad catching them. Hopefully, baby sis will fall in love and will use protection but become his cock slut. He bangs her well but treats her with respect and she cannot get enough of his big cock and his sweet cum ! Maybe, she'll learn how to take him all the way down her throat and suck him off making him pass out ?? She should rub her pussy juice on his leg or face and rub her big boobs on his face and cock head to see what he does for her ?? Maybe, Mom and Dad will try out the kids too ?? Thank you its very well written.

Frankie1952Frankie1952about 4 years ago

Love it, they are enjoying their experiments very much. If they go to the same college could they be a couple? Perhaps she is already knocked up. Anxious for some more of this story please.

AnonymousAnonymousabout 4 years ago
Well, now...

If Steve and Shelly get another chance, probably away from their parents, give a more detailed description of the young lovers. I know Shelly has large breasts and a rounded butt, and Steve probably has a good sized cock. Give that sexy young man some chest hair for that manly chest, and give them another chance to make love. Maybe she can suck him off too.

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