Very important note: I've always loved accidental penetration stories even if they're usually not realistic. And so this is a very lighthearted story. It's not meant to be an accurate representation of something that could actually happen in real life! On the other hand, around that highly improbable incident, I'll try to make the story as interesting as I can. If that's not your cup of tea, find another one of my stories.
Second warning: while there's no anal in this story, there's some teasing about it.
Edited by Pope1944. Thanks!
*****
Dustin woke up in his bed on the morning following the ball. He was alone in the room, Emily having already gone out. It was pretty late already and while Dustin was usually an early riser, the late night at the ball and the booze explained his long sleep. After opening the blinds, Dustin rubbed at his face and hair as he yawned. He decided to remain alone for a bit.
Here at the colony, he hadn't had much alone-time so far. He stayed in his room for about an hour, trying to understand what sort of strange phenomena could explain what was happening to him. Three accidental penetrations in three days. That just couldn't be coincidence. It was impossible. Dustin loved reading accidental penetration erotic stories, but even as stories they were rare! Real world accidental penetrations were bound to be exceedingly rare! And yet, three times in three days!
But try as he might, Dustin couldn't figure out why it was happening to him. He wasn't complaining, of course, but still... He then thought about what Lily had said to him as they entered the ball yesterday. So she knew about him and Emily. Dustin wasn't all that surprised: he knew the twins didn't keep secrets from one another.
The way she had grinned after whispering in his ear had led his mind down erotic paths. His slightly perverted and hormone-filled brain had briefly wondered if Lily had been interested in having sex with him. Alas, that wasn't the case. While she wasn't shocked to the point of calling the police or alerting their parents, she found the idea of incest profoundly weird. Dustin had come extremely close to telling her that he knew she listened to porn with her sister.
In the end he had refrained. Before they moved to another subject, she had also mentioned that Emily had loved the experience. Dustin had flushed at that comment and had asked Lily to stop talking about it otherwise he would have an erection. Right into his ear, she had then said "An erection about your sister? How perverted!" Despite her joke, Dustin could see that she was troubled by it all.
And it was puzzling him this morning. Sure it was totally normal to think that incest was weird. Wrong even. Yet Lily had always been the wilder twin. Edgier. More outgoing. Maybe it came to be that way because she wanted to prove that she was the older one, by less than an hour of course, by pulling crazier stunts. But when it came to this accidental yet very pleasurable sex between siblings, she was recoiling. Very peculiar.
When Dustin finally came out of his room and walked into the glorious, sunny day, Lily ran to him. Seeing her running completely naked in the sun like this awakened something inside him. Something between his legs. The twins were thin and very fit, and with her long dark hair flowing and whipping behind her, Lily looked remarkably sexy. "Dustin! You're my savior!" she cried. "You have to come with me to the beach!"
"Uh?" he grumbled before clearing his throat. "The beach is right there," he added, pointing to the lake.
"No! The real beach!"
"Oh. The ocean?" he asked.
"Yeah! Nobody else wants to come with me," she said with an exaggerated pout.
"You can drive there yourself now. Why dont—"
"Because it's boring alone. Please! Pretty please?"
Dustin was pretty sure that Lily wasn't aware of just how sexy she looked. Her hair were slightly wet from a previous swim and Dustin loved that wild, disarrayed look. She was breathing hard, as had her twin sister a few days ago after her climax. She had also interlocked her fingers together in front of her mouth and so placed her arms against her breasts. Those very round firm breasts, that Dustin happened to know exactly how they felt, were now squashed and looked bigger than they were.
Given that sexy look and the fact that he had thought a lot about the great sex he'd had with Emily this morning, Dustin knew he was in danger of getting an erection. And a day at the real beach with her didn't sound so bad in any case. "Sure," he said.
"Great!" Lily replied before hugging him reflexively.
After feeling his cock against her pussy and his chest against her breasts, Lily startled and pulled away. "Crap!" she laughed. "I'm sorry! But thanks!" She then ran back towards the lodge. "Oh!" she said, pausing for a moment and looking like a proud young colt with her long legs and wild mane. "We're leaving right now!"
Dustin sighed and smiled. He went back to the lodge after her and found the single pair of shorts, t-shirt and swimsuit he had brought. The beach wasn't a nudist one. Twenty minutes later the two of them were in their parent's car, on their hour long journey. They talked on the way there, but nothing particularly intimate. Lily made small talk and Dustin um-hummed a lot.
At the beach, as she got out of the car, Dustin looked at his sister stretching. With her bikini on. For nearly a week now, he had seen her naked every day. "Gods, it's strange to see you wearing a bikini," he said.
"I know!" she replied gaily. "Same with you and those huge swim trunks!" she laughed.
"I feel very uncomfortable." Dustin replied.
Soon after that Lily ran to the water, looking once again like a young mare in the prime of her life. And nude or not, that black bikini was sexy as hell. As he swam about close to her, he thought about how nudity and sexiness were two very different concepts. He had seen everything his sister had to offer in the past few days. More if he counted the fact that he had fucked her twin. But his eyes nevertheless kept darting back to that black bikini.
After a while they were back on the beach on their towels. Dustin asked his sister "Ever thought about going full time nudist?"
"Even back home?" she asked. "Yeah. I think I'd be up for that. Of course we'd have to build high fences around the backyard and put blinds over our every windows!" she laughed. "What about you?"
"And get to see you three naked all the time? Count me in!"
Lily guffawed as she slapped him on the shoulder. She said "Pervert!"
"What?" he defended himself. Whispering into her ear, he added "I didn't say I'd fuck you all!"
"What?" Lily cried, laughing now. "You guys are all the same!"
"Only for very pretty girls..." he replied.
"Oh, flattery will lead you nowhere with me, buster!"
The siblings spent most of the day at the beach, alternating between the water, the sand and the shade of the huge trees. At around 7 pm, there was a loudspeaker announcement that the beach was about to close. To their surprise, the two of them saw a lot of people getting up almost immediately and begin to gather their things.
"My!" Dustin said. "That's a bunch of obedient people!"
"Yeah... strange. Oh!" Lily said, understanding what was happening. "It's for the showers!"
"Oh crap!" Dustin said, getting up. "Let's go! Remember what happened last year!"
"Yeah!"
Last year nobody in their family had taken a shower before leaving. But the water around here was very salty and their skin had begun to itch madly in the car. And so this time Lily and Dustin dearly wanted to take that shower. So did everybody else! They ran to the closest shower area and managed to beat a lot of families. Nevertheless, as they arrived, there was only one stall left. Lily ran to it first and giggled as she entered and closed the door behind her. Dustin swore out loud. Still laughing, Lily opened the door once again, grabbed his arm and pulled him in.
"Just don't get any ideas, mister!" she said as she slipped her bikini top over her head. Unable to miss the firm bounce her breasts made after being pulled upwards, Dustin swallowed and said "Sure."
The stall was very small and they were cramped. It was pretty much impossible not to touch each other. Then again, they had spent the previous evening dancing together and Lily had felt his cock against her all night long. But Lily was in very high spirits, grinning as they tried moving about and soaping their bodies clean. "What will the others think?" Dustin asked. "Seeing a brother and sister together in this small stall!"
"They don't know we're siblings!" she replied as she pushed her bikini bottom down.
Doing so mean that she had to bend down and she was surprised to find herself very close to Dustin's cock. It was still soft, but was beginning to show signs of an erection. She stood up quickly, but was still smiling. "Keep that dangerous thing down! You never know if I'm going to slip!"
"Haha, very funny!" Dustin said, knowing she was talking about his accident with Emily. "But, seriously, I don't think I can keep it down being so close to you as we lather ourselves. It's just too much like a shower and showers are... er..."
"I know... Very erotic." Lily breathed before looking at him more seriously. "I don't mind, but, again, don't get any ideas."
"Fine. Of course."
But Dustin wasn't so sure about that. She had pulled him in the stall with her when he could have waited five or ten minutes outside for another one. She had decided to strip naked while they could have kept their swimsuits. And she did keep bumping into his cock. Was this all a set-up? Lily was the wilder one after all.
When she began to wash his back, Dustin was pretty sure that Lily had a naughty plan in mind. Then again, he decided to wait. A minute later she stopped washing his back and turned around. "My turn." she said.
