Masturbating on the train to your place

After a few minutes, Sabrina comes downstairs wearing a tight pair of jeans. Her pink top doesn't even touch her shoulders, but below that point it's fairly modest - no cleavage this time around. "I don't know if you can call this sexy, but it's laundry day, so..."

"No, no, it's perfect. Everyday outfits make your videos more real and immersive. There's something uniquely arousing about an otherwise normal-seeming girl showing her sexual side." You could persuade her to wear something sluttier, but you really believe what you're saying. "Besides, this shows off your features really well, while leaving enough to the imagination. It's sort of... sexy casual."

As you talk, a smile spreads across Sabrina's face. "You're really sweet, John." She takes a seat. "So, any ideas?"

"The ride here got me thinking: what if you masturbated on the train? There would be at least a few strangers around, but seats are pretty high, so it's not like anyone would actually realise you're touching yourself." Smirking internally, you add, "You haven't actually been that close to public exposure yet, right? But the odds of being caught are still low, if we're careful."

"That sounds amazing." A little colour creeps into Sabrina's face. "Doing it so close to strangers would be pretty... intense."

And you, of course, will be the closest. "We could just take the train to my place, maybe grab dinner there." Maybe stay the night. Maybe in the same bed. Maybe naked. "Forty minutes is enough time for a couple of takes, if you want."

Sabrina wets her lips. "Uh, after today, I could definitely finish more than twice in that period." She pauses, looking slightly nervous. "I'll try to draw it out a little. For the video."

"Sure." Then you add, "Don't push yourself, though. You look like you could use some release."

It's a good thing Sabrina lives so close to the station, because the train arrives just ten minutes later. As you both step on, she winces.

The carriage is much fuller than it had been on the way here. It's not sardine-level-packed, but most seats are taken. After some awkward shuffling around, you score an empty row, and Sabrina sits across from you with a nervous smile. "No kidding about being in public," she murmurs. "I'm already getting..." She takes a deep breath.

Honestly, knowing what's about to happen, you're not entirely composed either. Both of you scan the train for any prying eyes, but at this time of the day, everyone's bored and keeping to themselves. You pull out your phone. "Are you ready?"

Staring straight ahead, Sabrina simply nods.

You start recording. For a few seconds, Sabrina sits quietly like every other passenger. The anticipation is overwhelming. The way she ignores the camera and makes herself so unremarkable almost tricks you into thinking she's chickening out.

Almost.

Finally, her hand slowly moves up her body, casually cupping her covered breast. Through her top, Sabrina gently squeezes her boob, then brings the second hand up to give both of her girls equal attention. An onlooker could chalk it up to maybe scratching her chest if she didn't seem so excited about touching herself. Thankfully for her, the seats are just high enough that nobody could see her antics without getting up, except for the lady in front of her with eyes shut and airpods in.

For the first time, it occurs to you that Sabrina's bare shoulders mean no bra straps, and the overt points in her top between her molesting fingers confirm your suspicion. As she starts to pinch her nipples, her eyes close and she lets out a light sigh. The train is pretty loud tonight, so little noises like that should go undetected.

Having groped herself for a minute or so, Sabrina moves onto the main course. After shooting a cautious glance at the back of the carriage, she sneaks one hand under her jeans. At this point, she's still fully clothed, but you can clearly see her sensual strokes under the denim. The movement naturally makes her pants slide down her hips ever so slightly. You expertly move the camera to get a narrow view of the lacy panties that separate her fingers from her doubtlessly soaked pussy.

It's been a few minutes now, and even with her gradual movements, Sabrina's quite flushed and tense. She pulls her hand out of her jeans and slides it beneath her underwear. As her fingertips meet her clit, she lets out a quick, loud gasp that catches nobody's notice except yours. For a second, she lets go of her boobs to slip a hand into her top from above, playing with herself skin-on-skin.

For a second Sabrina's eyes meet yours, and you do your best to give her a mundane smile that hides your arousal. Without stopping, she scans the train again. Then, taking a deep breath, she pivots toward the camera and tugs her top down. She only pulls far enough on one side to reveal her left tit, but it's effective nonetheless. Sabrina is showing off her beautiful, perfect breast on the train.

Staring at her half-exposed bust, you have to consciously close your mouth. Watching her palm and pinch her own boob in the flesh is a whole new kind of intense. Sabrina grins at you before suddenly moaning, bucking her hips into her hand as if they have a mind of their own. As she fucks herself, she slinks down the seat, breathing like she just ran a marathon. An orgasm can't be far off.

You see people walking past in the window behind Sabrina, and realise you've reached a station. In moments people are piling aboard, and a few step into your carriage.

Oh, shit. You wrack your mind for a way to subtly alert Sabrina - who seems lost in her own building pleasure - but nothing comes to mind that wouldn't interrupt the video, let alone draw unwanted attention. Most of the newcomers see the fullness of the train and take the first empty seats they find, but the strangers just keep coming, closer and closer to discovering Sabrina. The whistle sounds as a man in sunglasses and a trenchcoat steps aboard.

When the tall guy is two packed rows away, Sabrina finally opens her eyes and freezes. With one titty out and her jeans creeping down her hips to reveal wet panties, she's too late to react.