I got rumbled wanking myself secretly under the table on a train. I had dared myself to write some amateur porn about some of the women who were on the train and one girl had noticed me getting more and more excited. "you f*****g perv""she said as she whipped the piece of paper from me."oh my god, that's filthy". She slid next to me and grabbed my cock through my trousers. Pushing my arse off the seat, she demanded to w**k me for all to see."Let me pull your trousers and boxers down, let's see how you like being exposed". As we pulled into the next station, she made me come for all to see on the platform. God her pussy was wet after that and I fucked her there and then, not caring who saw, it made my cock instantly hard again.