Twin Sister's Next Surprise

(Author’s note: Yeah, I know, I said that “Twin Sister’s Surprise” was going to be a one-shot story, and that I wasn’t going to write any more parts to it so as to not take away from the impact of the original story.  Okay, so I changed my mind.  This idea hit me out of nowhere and it seemed like the thing to do, so here it is.  And this time I won’t promise that there won’t be any more parts to this story.  I’ll just say enjoy it and see what happens next!

This is a work of fiction.  Any resemblance to any person(s) living or dead is purely coincidental.  All characters depicted in sexual situations in this story are at least 18 years of age.  This work is copyrighted and may not be distributed in any way by any person(s) without the express written consent of the author.)

It had been about a month since Paul’s twin sister, Penny, had surprised him by giving him a blowjob on the couch while watching a porn video, and since then Penny had surprised him twice more – once later that night as she had hinted at, and again a few days after that when she came into his bedroom in the morning while he was still sleeping and caught him with a case of “morning wood.”  And in both cases when it was over she had acted as if nothing had happened, denying it when he said it did.  But as much as Paul was enjoying these unannounced blowjobs – and he had discovered that his sister was really good at giving blowjobs – he was dying to fuck her.  Every time he thought about it his dick got so hard it hurt, and he felt like if he didn’t fuck his twin sister soon he was going to lose his mind.

They were both laying out at the pool in their backyard one afternoon, taking advantage of the opportunity to just relax and do nothing in particular.  The summer was just about half over, and Paul wasn’t looking forward to the summer ending at all.  When that happened both he and Penny would be leaving for college – separate colleges, that is – and the special relationship that had developed between them would be over.  They had never talked about it, not so much as a single word, with Penny always acting like nothing had happened.  This puzzled Paul but only to a point – he really didn’t care about figuring out why this was happening the way it was.  All he knew what that he wanted it to continue.  Paul turned his head and looked over at his twin, Penny, who was lying on her stomach with her head turned to face him, resting her head on her crossed arms.  Without opening her eyes and as if she knew he was looking at her, Penny spoke up.

“Paul, would you do me a favor and spread some suntan oil on my back, please?” she asked.  “I don’t want to get burned.”

“Sure thing, Penny,” he said, getting up from his chaise lounge and walking over to hers.  He bent down to pick up the bottle of expensive suntan oil from where it stood next to her lounge, then sat on the edge of the lounge next to her.

“Do it right, please,” she said, still not opening her eyes.

“Huh?” he said, confused.

“Get on the lounge, put your knees on either side of my legs so you can reach, and do it right,” she said calmly.  Penny could be a bit bossy at times, and apparently this was one of those times.  But Paul was used to it by now, so it didn’t bother him.

“Oh, okay,” he replied, doing as she said. 

He couldn’t help but take notice of Penny’s very shapely ass as he did as she asked, and the thong bottomed bikini she was wearing didn’t help any.  Next to her tits her ass was the best thing about her body, and Paul thought it was as close to a perfect ass as you could get.  It may have been a bit bigger than others would have liked, but to Paul if was perfect – round and full, the cheeks perfectly shaped, and she had such an erotic wiggle when she walked!  It gave Paul a hard-on every time he saw that, and now, looking down at her ass right in front of him mere inches away from his cock, he felt his cock beginning to grow inside his trunks.

“Well, come on, what are you waiting for?” Penny said, a bit irritated that he was taking so long.

“Okay, okay, keep your shirt on,” Paul said.  He flipped open the top of the bottle and squirted some oil into the palm of his hand, then closed the bottle and put it down.   He rubbed his hands together to spread the oil over his palms and then leaned forward to place his palms against his sister’s back just below the shoulder blades.  He began rubbing the oil onto her skin, spreading it around on her back.  By now he had a full-blown erection, and he was glad that she couldn’t see the front of his trunks tented out the way they were.  He leaned forward to reach her upper shoulders, and when he did he felt the tube of his hard cock pressing against her ass, pushing against the valley between the two cheeks.  He pulled back quickly, not sure if she had felt it or not.

“Why did you stop?” she asked, not lifting her head.  “That felt good, and besides, there’s no way you got enough oil on my shoulders, so put your hands back up there and finish what you started,” she said.

Rather than try to explain to her why he stopped, Paul just did as he was told.  He leaned forward and reached out to put his hands on the tops of Penny’s shoulder blades, and when he did he felt the rock-hard tube of his cock pressing firmly between the cheeks of Penny’s ass.  She lay still beneath him as he rubbed the oil over her shoulders, his cock pressing against her ass the whole time, she not moving or making a sound.

And then it happened.  Penny clenched down with her ass muscles, gripping the tube of his cock with the globes of her ass.  It was only for a second or two, but there was no doubt that it happened.

Paul froze, not knowing what to do.  His cock was still pressed against his sister’s ass, and before he could decide what to do next she did it again, flexing her ass muscles around his cock, only harder and longer this time.  She kept her ass flexed on his cock for a good five seconds, and right before she released it she moved her ass up and down just the tiniest bit.

Paul thought he was going to cum in his swim trunks right then and there.

He paused for a moment or two, then began spreading the oil over the rest of her back, keeping his cock pressed against her ass the whole time.  She flexed her muscles a third time, gripping his shaft with her butt, and again moved it up and down before releasing it.  He was just about finished spreading the oil on her back and began to move back when she spoke up.

“My butt, too, please,” she said.

“Uh..su-sure, Penny,” he stammered, excited at the prospect of getting his hands on his sister’s ass.  He picked up the bottle of lotion and put some more in his hands, then put the bottle down and spread the oil over his hands.  Then he held his hands over his sister’s butt for a moment, his hands shaking just a little bit, before dropping them down onto the nearly perfect rounded globes of her ass and squeezing them just a bit as he rubbed the oil over them.

“Mmmmm, that feels good!” Penny moaned, smiling with her eyes closed.  She flexed her ass again beneath his hands, and that made his cock jump.  He rubbed the oil over her ass for a few more moments before Penny spoke up again.

“Put some more on the top of my shoulders, please, Paul,” she said.  Paul did as she asked, reaching up for her shoulders and pressing his cock against her ass again, and she immediately clenched her ass on his cock, squeezing it hard with her strong cheeks.  Paul let out an involuntary moan at the sensation of his cock being gripped by his sister’s ass, and at this she gripped it even harder.

“You know, you’d better do something with that boner of yours before it starts to hurt,” she said, taking him completely by surprise.  “And you can start by taking it out of those trunks,” she said.

“Huh?  What?” Paul said, totally surprised.

“I said, take your dick out of those trunks,” she said, a little irritation in her voice.

“Sure thing, sis!” Paul said, reaching for the tie in the front of his trunks and pulling it loose.  He pulled his trunks down enough to set his cock free, and as soon as he’d done this Penny spoke up again.

“Now finish my shoulders, please,” she said.

Paul put some more oil on his hands and then reached up for her shoulders again, and as soon as he did Penny clenched her ass onto the tube of his cock, pushing her hips up to trap it against his abdomen and keep it from slipping away now that her ass was covered with oil.  Paul rubbed her shoulders as she gripped and squeezed his cock with her ass, moving her hips up and down as she did.

Paul couldn’t believe what was happening.  He looked down and watched as his twin sister gripped and squeezed his cock with her ass, and if he didn’t know better he would have sworn she was trying to make him cum.  But what she did next took him completely by surprise.

“Here, let’s do this,” she said, releasing his cock from the grip of her ass and then reaching down and around behind her to pull the string of her thong bottoms out of the way.  She lifted her hips up to get the small piece of material clear of her pussy, then reached back and grabbed his cock in her hand.  Without hesitation she pushed his cock down between the cheeks of her ass, lifting her hips up as she did, and before he knew it he felt the head of his cock slip easily into her hot, wet, and very tight pussy.  She dropped her hips back down onto the chaise lounge, driving his cock deeper into her wet tunnel.

“Holy shit, Penny!” he gasped, looking down at his cock buried in his sister’s pussy.

“Holy shit, what, Paul?” she asked, again as if nothing was going on.  “Are you going to finish putting the oil on my back or not?” she said insistently, clenching her muscles around the head of his cock in her pussy as she spoke.

“But, Penny, my cock is…well, my cock is in your pussy!” he stammered, still trying to recover his senses.

“No, it’s not,” she replied, not lifting her head or opening her eyes.

“Uh, yes, it is!” he repeated.

“NO, Paul, it’s not!” she said, squeezing it again.  “Now would you PLEASE finish?” she said.  Paul wasn’t sure if the irritation he heard in her voice was because she still wasn’t covered with oil yet or because he wasn’t fucking her like she obviously wanted him to.  After all, she had just slipped his cock into her pussy, hadn’t she?  The fact that she was acting like it hadn’t happened didn’t change the fact that the first two inches of his dick was buried inside his sister’s pussy.

Not being able to decide what it was she really wanted, Paul decided to give her both.  He leaned forward and put his hands on her shoulders again, rubbing the oil around on her skin while he began slowly thrusting his cock in and out of her pussy.  He pushed in a little deeper with every stroke, and it didn’t take long for him to bury his cock completely in her, his abdomen pressing against her ass as he held it there.  She moaned long and low as he did this, and she moaned again when he started sliding his cock in and out of her tight, wet pussy in long, slow, and very deep strokes.

‘Holy shit, I can’t believe I’m doing this!  I can’t believe I’m finally fucking my twin sister!’ he thought to himself, feeling Penny start to move beneath him.  She started lifting her hips up to meet his thrusts, squeezing his cock with her inner muscles as he pulled out.  He tried to keep rubbing the oil on her shoulders but it was impossible now, so he put his hands on the sides of the lounge next to her shoulders and concentrated on fucking her instead.

“Oh, my God, yesssss….” She moaned beneath him, her hips moving to meet him time and time again.  Her pussy was very hot, very wet, and very tight, and he knew it wouldn’t be long before he was pumping her full of his cum.

“Oh, my God, I’m gonna cum!” she suddenly gasped beneath him, and a split second later he heard her stifle a cry as her orgasm hit.  He felt her pussy clamp down on him and her hips buck as her orgasm shook her, and that was all it took to set him off.  He groaned loud and long as his cock erupted inside her, and he pushed forward hard.  She lifted her hips up to meet him and he drove in deep, his cock pumping and pulsing as it shot stream after stream of hot cum deep inside her.  He heard her stifle another cry, and he pushed forward hard and held his cock inside her as it finished pumping his load inside her.  The whole thing was over as quickly as it had begun, and they were both left spent, shaking, and gasping for breath.  It took all of Paul’s strength not to collapse on top of her, holding his body up above her instead as he fought to catch his breath.  After a minute or so Penny spoke up.

“You can get off of me now, Paul,” she said.  Paul did just that, getting up from his position over her and sitting on the lounge near her feet.  Penny pulled the thong back in place and then got up, rolling over and pulling her legs up to get them past Paul sitting near her feet.  She sat on the lounge for just a moment while she adjusted her bikini bottoms, then got up and turned towards Paul, looking down at him as she spoke.

“Thank you for oiling my back, Paul,” she said, matter-of-factly as if nothing out of the ordinary had happened.  “And you might want to cover up before somebody sees you sitting there with your dick hanging out,” she said, turning to walk towards the house.

“Uh, Penny, wait a minute, we need to talk, don’t we?” he said, standing up and pulling up his trunks.  She stopped and turned around to face him.

“About what?” she asked.

“About what just happened,” he replied.

“You put oil on my back.  Big deal.  Nothing much to talk about there,” she said.

“But Penny, it was more than that!  We…I mean, I…” he stammered, taking a quick look around before he continued.  “I just fucked you and came inside you!”

“No, you didn’t,” she said.

“Yes, Penny, I did!” he insisted.

“NO, Paul, you didn’t!” she replied.  “And that’s that!” she said, turning and walking away towards the house.  She stopped as she got to the kitchen door and turned to look at him, a sly smile on her face.

“And if you’re lucky, and I mean really lucky, maybe you won’t fuck me and cum inside me again later tonight,” she said.  Then she turned and went into the house, closing the door behind her.  Paul sat down on the lounge, utterly and totally confused.

“Man, I’m never gonna figure her out!” he said to himself.  He sat there for another minute or so, then picked up his towel and the suntan oil and headed for the house.

Fini.