More turned on than she had been for a long time, she pressed against him, her hard nipples pressing into him and leaned forward, put her mouth to his ear and whispered quietly "A gentleman would have put his briefcase in front of this you naughty man" and rubbed the back of her hand across his crutch, feeling the bulging hardness. Both his eyes, and his mouth opened wide with surprise.
Enjoying the reaction she'd evoked, she began rubbing his hardness with the back of her hand while looking into his glazed open eyes. Again she leaned forward and began whispering in his ear. Silently he nodded his sweat streaked face and whispered "Yes, yes, oh my god yes" Satisfied that he would do as she'd told him, she stopped her teasing of him and squirmed in the crush to turn round again so once more her back was to him.
Almost immediately he began following her whispered instructions. He pressed himself against her, she could feel his excited penis against her bottom all the time now. Reaching down with her hands she took hold of each side of his overcoat and pulled it forward slightly. She felt his hand pull down his zip behind her and lift her skirt slightly, then he released his hard penis from his trousers and moved forward as far as he could. A soft excited moan left her lips as she felt his hard naked penis pressed against her bottom. She shifted her legs slightly and the hard tip slid between them, pressing against her thong clad pussy. Gently she began slowly pushing back and forth against it with the short movements the cramped space allowed. Each time the train rocked and bumped causing him to thrust it almost brought a cry to her lips, the feeling of his hardness rubbing her and the heavy breathing from behind had her on the verge of an orgasm.
As his breathing became heavier and he started thrusting even on the smoother parts of the journey she realised he was close to cumming. Unable to resist, she began a wiggling thrusting movement, not caring if anyone guessed what they were up to. Suddenly the train hit a particularly bumpy stretch of track and she heard a gasp from behind and a warmth on her thighs and the crotch of her soaking thong as he came on her. Past the point of caring, she quickly let go of his coat, struggled to turn round and pressed against him. She reached down, took hold of his still hard penis and guided it under the front of her skirt and into her thong, the hard tip against her aching clitoris. A minute and another bumpy stretch of track later, she was biting on her lip as he came again all over her clitoris, also releasing the explosion that had been building up in her, giving her a shuddering orgasm, thankful that her strange cock thruster was holding on to her.
As the feeling subsided, she looked at him and said "Nice meeting you, we may bump into each other again sometime" straightened her skirt and began getting ready to leave the train which had also arrived at its destination.