Im a 50 year old guy in melbourne. I look after myself well and dont show my age. Each morning I travel on the train to work and usually stand up to let elderly ladies have a seat.

About two weeks ago a girl in her early twenties or maybe even slightly younger started getting on at one stop past mine. she stood behind me in the crowded train which just got more crowded as the journey continued into the city.

As the crowd increased she was jostled about a bit and I ended up offering her the spot in front of me. Im 6'1" so I was able to reach over her to hang onto the rail. We exchanged pleasantries for a while then settled back into the trip. About 10 minutes later she started to lean up against me, and i put it down to the damn rocking of the train. But as the train stopped at the next station she moved her very cute little bum right up against my crotch and very discreetly moved from side to side.

I couldnt believe it was happening and obviously became aroused. Im not small in that department and to my great embarassment my erection was very visible to anyone that happened to look my way. Thankfully the train was that crowded i felt noone noticed. Then the girl turned around and looked at me and smiled and winked, before again rubbing up against me this time very deliberately and provocatively. She continued to rub against my cock for a long time and seemed to be really enjoying herself, but then got off the train just before the city.

This happened again the following day and the next but she's started getting bolder. As its summer here shes wearing thin dresses now and has even grabbed my hand and put it on her bum which is small firm and very fuckable.

This morning though, just before she got off she turned to me and told me she really wanted me to fuck her. Im married and although this would be a fantasy come true, im hesitatnt as ive never strayed before.

I'm excited as to what she will come up with next...ill keep you posted