Mistaken Identity after Dark

She was passed out in a drunken slumber, her body tight against his. Such an amazing feeling to be snuggled up next to her; the warmth of her butt pressing into his hip and his hard member nestled comfortably in the cradle of her backside. Every exhale slowly released as she breathed in a regular rythmn.

Anon was debating whether he should wake her, so that she could return to her own bed before Mio and Haruko had the chance to notice them together. He began to question if it was alright for them to be seen in such an affectionate display by her sister; after all, Yuki and him were both single so there was nothing wrong with a little snuggling. Still, he couldn't help but feel a little apprehensive about what Mio and Haruko might think of it.

Of course, the irony of the situation was not lost on him; here he was pretending to merely be cuddling with Yuki above the sheets while quietly engaging in below-the-sheet anal penetration.

While these thoughts were spinning around in his head, the effects of the alcohol and a long day had taken their toll on Anon. He drifted off to sleep, still connected to the insides of Yuki's rear, with both of them snuggling close together in a peaceful embrace.

Their physical bond appeared to deepen their sense of intimacy and solace, a profound comfort that hung delicately in the balance, vulnerable to disruption should either Mio or Haruko awaken.

Chapter 4 - Unveiling at Twilight

It was still dark outside and the sun had yet to rise, but dawn was slowly creeping in when Anon awoke to his throbbing member inside of Yuki's back. No wonder he dreamt a series of wild and sultry sexual fantasies throughout the night. He had been aroused all night by her subtle movements, and the heat radiating off of her body. He couldn't help himself from wanting to make love with her again that morning.

Quickly his arousal was spiralling out of control and thoughts of waking up Yuki for a second round were becoming more and more tempting. He knew he should stop, but the temptation to just thrust a little bit further into her beckoned him. It would feel too good to resist. He held his breath as he eased himself in ever so gently, feeling her warmth envelope him as she groaned softly in her sleep.

He pushed forward, and pulled back, his movements gradually increased in intensity as he stayed deep inside her ass. The pleasure was overwhelming - her cute buttcheeks were both soft and tight at the same time. His passion growing with every thrust, he continued for a while in absolute bliss before she started to move. She shifted from side to side, arching her back as their rhythms combined and the pleasure intensified even further.

But as the morning was slowly beginning to break and the sun began to rise, their roommates were starting to stirr in their sleep. Anon needed to move quicker if he wanted to finish what he had set out to do.

Unfortunately he only managed to push into Yuki a few more times, not enough to reach the ultimate climax before her sister Mio would get up. Anon had to abandon his movements yet again, while Mio descended on the ladder from her bunk bed. But the feeling of his dick being logged into Yuki's ass while her sister was nearby gave him an extra level of exhilaration.

Yuki remained as still as a stone beneath the blanket, but in the morning's illumination it would now be possible to spot her with a watchful eye.

Anon found a thrill in the increased risk of discovery. Perhaps it was a lingering effect of the alcohol from earlier in the night. Before, when Mio had gotten up, he had kept his eyes shut and pretended to be sleeping. This time, however, he dared to open them and take a look at her as she went about looking for her phone, that was connected to a charger close to the floor of their cabin. His heart raced as she moved around the room unaware that he was watching her every move.

But he was starting to get confused. The young woman he was looking at didn't seem the same as the Mio he remembered. He was certain that Mio had dyed blonde hair. But this girl definitely had natural black hair.

Was this actually Yuki walking around? He racked his brain to recall the specifics of last night, unsure if he was remembering correctly or if he had been confusing the two sisters.

And if this was indeed Yuki, then who was his dick currently penetrating under the blankets? Was he actually fucking her married sister Mio?

He was so confused, all night he thought he was engaging with Yuki. But here was Yuki totally unaware of what was happening. Then, the girl who he now believed was actually Yuki left the cabin.

The girl beneath the blankets must have heard the door close and feel secure again, prompting her to start grinding against him again. She moved her hips sensually and her tight ass felt amazing as it caressed his shaft. The thrill of not knowing who was beneath the blankets only added to his pleasure. She pushed further against him, her breathing becoming heavier.

She whispered softly in Japanese again, and this time Anon could make out the words 'ass never again' and 'enjoy the last time'.

Anon was almost to his peak as the intensity increased with her every thrust. He was in a state of pure euphoria, completely helpless to halt her passionate movements.

Maybe he should have looked more closely at who was actually under the blankets. He just couldn't believe it was Mio; she had seemed so happy and flirty with her husband Haruto the night before. They had made such a picture-perfect couple.

But he was certain it wasn't Yuki he was with, as he distinctly recalled seeing her leave the room just minutes ago. His senses overwhelmed by the rhythmic grinding of the girl's ass on his dick, it became increasingly difficult for him to focus his mind on anything else. The sensations that coursed through his body made it near impossible to form any coherent thoughts. She was pushing him closer and closer to the brink of pleasure with each passing second, flooding his system with a rush of endorphins that left him feeling disoriented and enthralled at once.

But at that moment, he heard an unmistakable loud yawn coming from Haruto's bed. He looked over and saw Haruto turning. The girl beneath the blankets had also heard the noise and was clearly trying to remain undetected, but she didn't stop what she was doing. She cautiously continued her movements, slower and more careful then before, but still drawing him in very deep.

Haruto had now awoken with a jolt, his cheerful voice ringing out in the room as he joyfully exclaimed an enthusiastic "Ohayou!" As his eyes adjusted to the morning light, they soon fell upon Anon. His face lighting up in a wide smile, Haruto added a cheery "Good Morning!" towards Anon.

As soon as the first words came out of Haruto's mouth, the girl underneath Anon's blanket stopped moving and froze in place. Anon's dick still twitching deep inside her.

When Haruto added the "Good Morning", Anon could feel the girl trembling and stiffening in response. It was clear that hearing Haruto's voice had a strong impact on her.

But Haruto left him little time to process the situation, engaging Anon in conversation almost immediately. The resulting small-talk was mostly inconsequential and insignificant, but of course Anon had a very hard time concentrating or responding as his manhood was still embedded deep inside of the girl's backside.

To make matters even worse, Anon glimpsed what he had feared the most- a long tendril of white hair peeking out from under the sheets. There was no doubt about it; he had just been involved in sexual intercourse with Mio, Haruto's lovely wife.

But it was already too late to stop. Mio's trembling fear, her clenching her sphincters muscles, gave him the final push over the edge. His manhood erupted within her, injecting powerful spurts of semen into her butt. He could feel how Mio quivered and her physique rippled around his twitching member.

Haruto had posed a question to Anon, his gaze never leaving him, awaiting an answer. But Anon couldn't manage to speak, as at the very moment his dick was still ejaculating inside of Haruto's wife. Haruto repeated his query once more, but all that Anon could muster up was an agonized groan in response. His breathing had become labored and his hands trembled as he realized how close he was to revealing exactly what was going on below the sheets with Mio.

Haruto looked perplexed for a moment, but then proceeded to burst into laughter as he declared that Anon was too hungover and should get some more rest. With that, Haruto stood up and exited the room, presumably heading towards the bathroom just like Yuki did.

As he left, Anon felt a huge sense of relief wash over him. After all this time, it was the first time they had been alone in a room together. He could still feel his dick twitching inside of Mio as the aftershocks of pleasure continued, and now that they were undisturbed he could focus fully on his orgasm.

Mio was still trembling, her breath hitching as she tried to contain it. Taking her hands, she pressed them up against her face and covered her eyes, as if she was making an attempt to conceal herself from the world. As if she didn't want to face the truth.

Then, slowly, hesitantly she rotated her head around and her eyes widened with shock as they met his gaze.

Anon was watching as the corner of her lips began to quiver and his gaze followed her eyes as they darted around the room. She was clearly realizing the severity of her mistake when she confirmed it was him lying there with her and not her husband. And then came the sound, it was almost a whimper but it was enough for Anon to recognize what she had said - a panicked and strained "no" which reverberated through the air.

Anon felt completely lost, not knowing what to do or say. His penis, however, was seemingly operating of its own accord as it stirred once again at this most inopportune moment. This time his member twitched with far more intensity than before and it made one last involuntary spasm before releasing the remaining semen deep into her clenching bottom. Mio shouting out another "no, no" in response.

Chapter 5 - The Aftermath

Now Mio broke away from her trance, snapping back to reality in a mad dash to escape him as quickly as possible. She frantically yanked her body away, causing him to withdraw abruptly and his thick member to suddenly flop out of her tight anus.

She quickly leaped out of the bunk bed, tugging at her bright-colored pyjama shirt in an attempt to extend its length just a little bit further, covering more of her body. Shivering slightly despite the warmth of summer morning, she took a few steps back as if something were watching her from Haruto's empty bed.

She didn't have much time to get situated or address Anon, as Yuki suddenly reappeared from the restroom.

Anon could see the amount of emotion that Mio was trying to process as Yuki initiated a conversation with her.

He was still coming down from the intensity of his climax and attempting to take in the escalating situation around him. Knowing that he couldn't draw any attention to himself, he forced himself to look away, hoping it would make him less conspicuous. However, that didn't stop his mind from racing with questions - what had just happened?

He could hear Mio responding to Yuki, her voice shaking but he could sense that she was trying hard to sound normal, like nothing had happened.

His gaze purposely averted from them, he could make out the floor of the train compartment, and noticed a wet spot below Mio. Beads of sweat ran down his face as he realised that it was his own cum dripping down from her ass, travelling slowly but surely as it made its way down her slender legs before hitting the ground. She had taken him deeply to places he hadn't known existed; and he had deposited a huge amount of cum inside of her ass over the two rounds they had engaged in.

He was worried that someone could come across the telltale evidence of his night with his lover on the floor, and just as he was contemplating this potential problem, Haruto unexpectedly entered the room. His face lit up with a loving smile when he saw his wife, and he quickly embraced her in a close hug and greeted her with a passionate kiss.

Anon could see Haruto's arms tightly wrapped around Mio's waist, pulling her closer to him as he kissed her. Mio seemed hesitant in responding, not really engaging in the kiss, but she was also making no effort to push him away either. She still seemed to be in a very overwhelmed and confused state.

Haruto didn't seem to pay any attention to Mio's condition and Anon could spot him how he went even further by gently squeezing and fondling Mio's butt - the same one that just moments ago Anon had been inside of, pushing his own cum into.

Haruto released Mio's butt shortly after whispering something inaudible into her ear, turning away from her as if he had just shared a secret. Watching the two of them together like this made Anon's thoughts wander; he remembered how Mio had reacted and the words she had used when their bodies were intertwined, when he had accidentally penetrated her ass.

It was now evident to him that she had never allowed Haruto to fuck her ass before. And imagining Haruto trying to persuade and plead for Mio's permission aroused a strange sense of both guilt and extreme excitement in Anon.

Haruto and Yuki returned to their bunks and Mio excused herself, quickly heading to the restroom. Anon was relieved that no one seemed to have noticed anything of their intimate night's activities. He could still make out the big puddle of semen on the ground, an obvious trace left behind by Mio. He had to devise a plan for how he could conceal this evidence before anyone else noticed it.

After contemplating possible solutions, he decided that his best bet would be to hide it with the surrounding bags on the floor.

He hastily pulled his boxers up and got out of bed in a rush. His eyes fell upon the bags on the floor, but he acted as if he was merely looking for something amongst them to give him an excuse to move them around. Yuki didn't pay any real attention to Anon's movements, but Haruto had a mischievous grin on his face and teased Anon that it was good that he was still alive after all.

Anon had to be delicately cautious in order to get away with his actions. He took the bag next to the semen puddle, and slowly shifted it along over top of the mess until it completely concealed what was underneath. His plan worked like a charm; nothing seemed amiss and no one questioned any of his strange behaviour. He breathed an internal sigh of relief, feeling secure that he had gotten away with it.

After all the commotion Anon desperately desired a break. He carefully stepped outside their compartment into the hallway and eagerly opened the wide window to get some revitalizing air. His gaze was fixated on the beautiful landscape that had been lit up by the morning sun; trees, hills and winding rivers whizzing past as their train sped towards Bucharest. And as he watched, he couldn't help but feel a sense of admiration for his surroundings.

It was calm and peaceful yet mysterious, as if anything could happen at any moment. Even though he wasn't sure why exactly he had ended up on this little adventure with Mio, surely the rest of his journey was going to be full of more exciting surprises.

When Mio was coming back from the restroom, she looked more awake and refreshed. Anon had been watching her as she approached through the tight hallway. His eyes were glued to her, admiring her beauty even in an oversized t-shirt. Her perky chest was easily visible in the fabric of the top, her nipples poking subtly through the material. It was an alluring sight that he couldn't help but marvel at - a woman so stunningly gorgeous with only a simple piece of clothing on.

Mio was desperately avoiding eye contact with Anon, her cheeks turning a deep shade of red. She was eager to pass him and silently, not wanting to have an awkward conversation with him and facing the truth about their night together. However, Anon became more at ease and almost mischievous in his demeanor; he called out to Mio and greeted her in a loud voice.

He saw her jump a bit when he spoke, she had not anticipated that he would say anything and his mere presence was enough to make her uneasy.

Anon knew that confronting Mio directly may have been a bit harsh, but in his mind it was actually the best thing he could do for her. If they kept up appearances and acted normal around each other, then nobody would have any idea that the two of them were hiding something as monumental as there scandalous night together.

He also made no move to step out of her way or give her space, so they unavoidably brushed against each other as she snuck past him into the sleeping compartment. The contact sent a shiver through his body, as he was reminded of the night they had shared together.

Anon couldn't resist and he glanced over his shoulder to get one more look at Mio's backside. Her luscious, round bottom was barely concealed by her shirt, and its bubble shape was too much for him to bear. He'd never seen a sight like it before; the curves of her figure were truly something special.

It had been a while since Mio had disappeared into her bunk, and Anon was still standing at the window in the corridor, taking in the landscape and reflecting on last night. Haruto and Yuki had gotten up and started packing for their journey ahead. At some point, Haruto stepped out towards Anon to join him at the window. The two stood there for a moment in silence, marveling at the beauty of their surroundings.

A harmless conversation followed. Anon was savoring the moment; it was enjoyable to chat with the clueless husband, as images and recollections of his wife's butt and titts teased Anon's mind. Nonetheless, Haruto also gave off a fun and good vibe; Anon thought fondly that if the circumstances had been different they could have been great friends too.

Yuki also joined them for a time, standing next to Anon and smiling at him. It was quite evident that she still held some interest in him, but with a lack of a common language between them it was hard to make any real headway. He wished he could have flirted with her.

Mio must have surely noticed the strange situation that was unfolding before her eyes. In the moment, she called Yuki over with a subtle wave of her hand, seeking help from her sister. It was clear that she wasn't comfortable with Anon getting too close to Yuki. Anon could understand her feelings and didn't make any further attempts at Yuki,

Not long after their train pulled into the Bucharest main station, Anon watched as everyone packed up and prepared to disembark. He then noticed that Haruto had taken hold of the backpack he had been using to hide all of his mess. Anon couldn't help but chuckle at the sight; it seemed almost too perfect that Haruto had taken it without realising what substance was spread over and attached to it now.

When they stepped out of the train, it was time to say their goodbyes. Anon wasn't sure what was the proper way to do so, but Haruto moved forward and gathered him in a strong embrace. He then told Anon to stay in touch - perhaps they would be reunited again one day in Bucharest or any other place farther away. As a token of their newfound friendship he gave Anon his number on a folded piece of paper.

Yuki was initially smiling shyly at Anon, but in a moment that shyness had evaporated, replaced by a determined grin. She took a step forward and wrapped her arms around him, the hug more awkward than affectionate. Throughout it all, Anon remained focused on Mio; he could see the unmistakable nervousness in her eyes.