(27F) I rubbed my ass on a stranger’s cock on a train this morning until he was rock hard… His girlfriend stood right next to us.

This morning I was on a super crowded train during rush hour. The carriage was completely packed, bodies pressed together, barely any room to move.

There was a guy standing right behind me. Probably mid-30s. His girlfriend (or wife?) was squeezed in right next to him, holding onto the same pole. She was scrolling on her phone, completely oblivious.

I don’t know what came over me, but I started slowly shifting my weight and pressing my ass back against him. At first it was subtle, just “accidentally” brushing against him with the movement of the train. Then I got bolder. I arched my back a little and started gently grinding my ass right against his crotch in slow, small circles.

It didn’t take long. I could feel him getting hard through his pants. His cock started pressing and throbbing against my ass cheek. I kept going, pretending it was just the train moving us, but really I was deliberately rubbing my ass up and down his growing bulge.

He never said a word. He just stood there breathing heavier, trying not to move too much. His girlfriend was literally inches away, chatting to him occasionally about their plans for the day while I was secretly teasing her man and making him rock hard.

The whole thing lasted maybe 10-12 minutes until my stop. When the train pulled in I gave one last slow grind, then slipped out without looking back.

Does this make me a slut and should I feel guilty? I know…

I’ve been wet and smiling about it all morning. I know it was risky and kind of evil… but fuck, it turned me on so much.