Clubbing in the city isn’t so bad you tell your friends when they keep asking why you do it, ‘Why do I do it?’ you ask yourself for the tenth time as you and you sister stand on the crowded platform waiting for the tube home. Both dressed in skirts that are almost too short for decency and tight tops, your sister has always complained that you don’t wear a bra ever, your breasts firm large and almost falling out of the lower cut neck line. 11pm and you can’t believe how many people are still travelling, you see her jump and quickly look round, ‘I’ve just been goosed!’ she exclaims, pervert she says to the crowd in general as a number of men look on leering. Pushing on to the next tube that comes in you’re stuck in the middle of the carriage, you sister in front of you squashed close. You feel bodies behind you pushing against you as more people push on to the train. As the doors close and the train lurches you feel a hand grab you arse, tensing you feel it let go and you think it must have been an accident. Leaning in to you your sister tries to talk as the trip continues. Again the train lurches and the hand grabs you again, this time when the train moves it stays where it is! You tense again but don’t say or do anything, the hand gives you bottom a little squeeze and when nothing happens it moves down to the hem of your skirt, noticing you’ve gone quiet your sister asks ‘what’s wrong?’ shaking your head you mouth a headache. Feeling the hand slip under your skirt on to you almost bare arse you shiver slightly, again it squeezes and again when you don’t complain it moves to your arse crack, a finger follows it down, reaching the tops of your thighs it stops. The train lurches for a third time and the hand disappears, this time you have to step forward to stop yourself falling over, as the train moves off you stand nervously with your legs slightly apart. You feel a little guilty as you realise that you’re hoping the hand will return. Nothing happens and you start to think nothing will, then you tremble again as the hand moves straight under your skirt and on to your arse, moving straight down to where it was, the hand hesitates for a second when it finds you legs slightly open, then moving again it slips between rubbing slightly but with the packed carriage it can’t go where it wants and pulls away. A sudden disappointment grips you as feel it move then a body pushes harder against you and you feel the hand, still under your skirt, move slowly round your outer thigh and on to the front of your leg, this time the hand doesn’t stop but moves straight to your shaven mound, two fingers slip between your legs and your ground up against the body behind you. You start to flush as the fingers expertly stroke across your pussy mound teasing you. Feeling yourself getting damp you move almost without meaning too, opening your legs wider you invite the fingers to do as they will, accepting both finger slip inside your now wet pussy lips and start to tease you rubbing you tingling pussy harder, finding you clit they slip either side of it as they rub, rolling its hardening nub between them as you’re almost panting now as you feel yourself starting to shake as you realise you’re going to orgasm right there in the packed carriage and right in front of your sister too! Trying to control yourself you look at her for the first time and realise she hasn’t said anything for ages, seeing her looking down with her mouth wide open you know she can see what’s happening to you, she suddenly looks up at you and you flush furiously as your orgasm hits, you grab the pole between the two of you as wave after wave of pleasure throbs through your body making you shake harder with ever rub of the unknown fingers, the train lurches again as it pulls into a station and the hand disappears as people get on and off passed you as you still shake. The train pulls away and now you find enough room to turn round, disappointment flows through you as you realise one of the people who got off the train was your mystery hand! Trembling now you turn back to your sister who has a questioning look in her eyes, without her asking you lean in and whisper ‘no I don’t know who it was’ as she gasps you feel her hand touch the front of your skirt and realise that your juices have soaked it where the hand had been. Grinning with embarrassment you look at your sister as the train pull in to your station. ‘Let’s get the car’ you say to stop her speaking. In the car park you get in the car and she turns to you, ‘why did you let it happen’ she questions. Unable to answer her you just shrug and say ‘I couldn’t help myself once it started’ she sigh and admits she wishes she had the courage to let something like that happen to her, without stopping to think you reach across to her, ‘what are you doing?’ she gasps. Placing a finger on her lips you quiet her, your other hand slipping her skirt up exposing her white lacy thong, you stroke across it and she jumps ‘don’t, this is wrong’ she objects. Ignoring her you stroke again this time a little harder and further down between her legs, gasping again she opens them a little wider without being asked. You stroke again and this time you slip the thong across baring her trimmed pussy, as you look down at it you feel your own pussy throb, touching the trimmed hair you again stroke her pussy. Feeling it dampen as you do you slip a finger inside and rub up and down coating it in her juices as you listen to her pant and moan low. Stopping for a second you look at her as she opens her legs wider ‘please don’t stop’ she almost begs you, seeming to forget who you are. Again you start to tease her pussy rubbing the length of your finger up and down, finding her clit you tease it running you finger tip round and over it concentrating all your movements on her clit now you rub harder as she starts to pant louder, moaning like nothing you’ve heard before. Suddenly she clamps her thighs together trapping your hand between them and holding your fingers against her now rock hard throbbing clit as her orgasm rips through her body she almost arches herself up and out of the seat, crying out with the pleasure. Shaking as her orgasm subsides your sister releases your hand and looks at you shocked, ‘I can’t believe I let you do that to me’ she whispers embarrassedly. ‘it’s our little secret sis’ you reply as you start the car and pull away your fingers still coated in her juices, glancing at her you hear her gasp again as you say ‘maybe you’d like to try something more with me some time?’.