His eyes go wide, and I know he is getting a perfect view of you splitting me open and how wet I am. I squirm and blush at being shown off to a stranger so blatantly, watching his gaze then roam all over me. He looks back down as he sees me move on you as the train jumps and turns around a corner. He grins as he glances up and sees me blush.
The train is slowing down for the stop, and you slowly close your legs and the guy reluctantly gets up, watching me as he goes. You adjust under me, appearing like you're settling me into a comfortable position, but really you are rising up, holding my hips down, so you can push into me to remind me just how turned on and hard you are; not like I would be forgetting any time soon! Just staying mostly still, and doing so for this long, I will feel your imprint for ages after this is over.
Another guy sits across from us, as people settle again; you assess him quickly. You bite my ear and growl, "Watch him get hard for you." You catch his eye and open your legs.
He was already looking us up and down and again I see eyes widen as I come into view when my skirt lifts. I squirm in embarrassment but, as I do, I feel myself fluttering and wiggling as you again twitch inside me. He eyes are glued to me, to us, as he slightly readjusts himself and - yes, as you knew, in the tight, thin, tailored pants he is wearing, I can tell he is hard. This just makes me squirm more. And with that, I feel you lean down to whisper to me, but instead you dip down further and bite my neck: hard! On my shoulder at the nape of my neck, the place where you know is my favourite spot; you press your teeth into my skin...
I tense and you feel me grind down on you and start to spasm rapidly; I feel you swell, as you bite down, just that bit harder, and I tense as I tip over the edge and cum, clenching around you hard; biting my lip, trying to not cry out. You feel me cum, and you growl as you continue to bite down on me as you cum, jerking inside of me, as my aftershocks pulse around you.
The guy across from us cannot believe what he has seen; he has his hands over his hard cock and, as I glance back at him, I blush as I realise that I just came on a packed train and gave him a very slutty sex show. A show of a very obviously horny exhibitionist slut, who cums in public, in front of strangers, and who now has a mix of cum dripping out from around your hard cock and onto the train seat.