you are on a train looking around, and you see a dude and his hot girlfriend, remembering you how lonely you are. All of a sudden, a bunch of people get inside the train pushing everyone into different ways and the couple got split while you end up pressing you against the girl from behind "Eh? What are you doing? Back off..." she replies, but her voice trails off after she sees how good looking you are. She blushes and whispers for herself "It's like one of my doujins..." she shakes her head and notices her boyfriend is now far away from her separated by a crowd of people. She looks back at you and whispers "Uhm, mister?" she lifts her skirt and rubs her butt against your dick "what if I do this to you?" she is blushing furiously while looking back to her boyfriend to see if he notices this

She moans quietly as you grab her ass, feeling how good it feels to have someone touch her there like this. "M-mister...," she whispers, leaning back into your grip. Her cheeks are flushed and her eyes dart between you and her boyfriend. She can't help but wonder what would happen if he found out about this.

"Mmm...," she moans again as you reach under her skirt and grab at her panties. She shivers with pleasure, pushing her hips back into your touch. Her eyes meet hers boyfriend's briefly before she looks away, feeling incredibly guilty but unable to resist the desire coursing through her.

With each touch you make, she feels more and more out of control. Her heart races as she listens to the words spilling from your lips. "Y-yes," she whispers, her breath coming faster now. "I want it..." She's never been with anyone else before; the thought both terrifies and excites her beyond belief.

As you ask, she realizes how much she actually wants this. Her body aches for release and she can feel her panties growing wet with excitement. She bites her lip, knowing that giving in to temptation like this could ruin everything, but unable to resist any longer. "Please," she breathes out, trembling beneath your touch.

With one swift motion, you push her panties aside and thrust your hardness into her aching core. She lets out a strangled cry of pleasure/pain as she's finally filled in this most intimate way. Her body convulses against yours, gripping you tightly as waves of pleasure wash over her. This feels so wrong... yet so good...

Her cheeks burn with shame and desire as she tries to keep quiet, but each thrust of your hips makes it harder and harder not to moan aloud. The guilt is nearly overwhelming, but the ecstasy flooding through her veins is too powerful to ignore.

With each thrust you make, she feels herself losing control even more. She tries to push back against you, wanting this feeling to last as long as possible despite knowing it's wrong. "Yes," she hisses through gritted teeth. "Fuck me..." Her nails dig into your skin and her hips move in time with yours, taking everything you have to give. It's exhilaratingly sinful and she can't help but wonder how long it will be before they get caught...

The feel of your body moving against hers is intoxicating. She bites her lip to stifle her moans as you speed up, each thrust driving her closer and closer to the edge. Her legs tremble and she can't help but grind herself against you, desperate for release. She looks over at her boyfriend again, hoping he's too distracted by everything else going on around them to notice what they're doing... But a tiny voice in the back of her mind tells her that it's only a matter of time before he does.

Her breath comes in ragged gasps as she nears her peak. "Oh God..." she whispers hoarsely, arching her back and pressing her hips tighter against yours. With one final thrust you both cry out in ecstasy, pleasure washing over her in waves. Her body shudders and trembles beneath your touch, feeling so good that it almost doesn't matter what they might say or think when they find out... Almost.

She forces herself to catch her breath, trying desperately to calm the pounding of her heart and steady her racing pulse. "We should... we should stop..." she whispers. "I need to... go back to him..." The guilty ache in her chest returns tenfold now that the passion has died down.

You're right... we should... she moans softly as you slowly withdraw your hardness from her body. The cold air between your skin feels foreign and unwelcome after how good it felt to have you inside her. Looking at her boyfriend again, she realizes that there's no way they didn't notice what just happened. Her cheeks grow even redder as she stands there, helplessly waiting for him to confront them.