The experience I'm relating to you just happened a few days ago. I have heard about this kind of thing happening but I never imagined I would have any experience with it.
My wife and I were in Boston just the other day. It was during the week smack dab in the middle of a work day between 11 am and noon. We were having a nice leisurely day starting out late to go see a few sites in this very historical city. We had made our way to the "T" heading for State Street. It was very crowded on the line that day. Our timing wasn't to bad as we were able to enter the train. Of course everyone on the train is squished body to body.
My wife and I were chest to chest in the car. It was kind of quaint as we were feeling quite alone crammed in with hundreds of others. That particular car was very loud, I didn't know if it was because of all the people or if it was overdue for maintenance. Anyway I couldn't tell if people were talking or not. My wife and I didn't say anything just cause of the noise level.
At the next stop it didn't seem like anyone got off but more people pushed on. As the crush tightened I had to step to the side to make room. This pushed me away from my wife who wasn't able to move from her spot. Now there were two of three people between myself and my wife. I had to look around the guy in front of me to see her and we give each other a smile.
We road along like that for only a short period when there was a shift in the crowd that wasn't related to the movement of the train. I looked around the guy in front of me, whom had his back to me, to see my wife but her head was down and she was mostly hidden by the guy closest to her. His back was facing me and he was a fairly large guy. The car shifted and I move just enough to the side to get a better view of my wife. I could mostly see her from the shoulders up but I could catch a glimpse of her waist now and then. At this point we were at another stop and this time I don't know if anyone got off or on. I really couldn't see how anyone would be able to enter with this many people crammed in.
I was still watching my wife as she kept her head down. I couldn't see much movement from her. As the train started the crowd lurched with the train and I was shifted from my spot just enough to get a better look at my wife. I could see her face as she looked to be biting her lip. I could also see her arms at her side. I remember the feeling of "What the fuck is going on?" As the train continued to pick up speed my wife lifted her head to the sky. She was defiantly biting her lip and her face was very flush. In her current position I could see that her sundress had been bunched up around her midsection. Now this day was hot and I knew she wasn't wearing much in the way of cloths. I wasn't sure if she was wearing underwear as that is a normal option for her.
As I was watching this scene play out before me I saw a hand reach around my wife and slid up under her dress that was bunched up around her midriff. I could see the hand squeezing my wife's tit. As I strained for a better look I was able to see a hand on her hip. That hand looked to have a firm grip on my wife's hip. It seemed to just hold her in place. As I looked to my wife's face her head appeared to be moving in a slight rhythm back in forth in opposite of the train car's movement. Wholly shit, I think she is getting fucked. Her face was tight and flush as she kept her eyes closed and her chin to the sky. I noticed the hand that had been on her tit had worked her dress higher exposing her tit flesh. I also saw that hand fighting another hand for its position molesting my wife.
Another stop came and people exited the train and not as many boarded. The pressure of the crush lessened but not much. I could not make my way to my wife as there were still many people between our locations. I was able to get a better view of her body as the group around her were able to make more room for themselves. I could see now that she didn't have any panties on as I could see her bare hips with a view just around her front almost to her "v". There was still that gripping hand on her hip which seemed to be pulling her back and forth. I could also see her smooth flat stomach as my gaze followed up her naked body over her ribs to the one naked titty that was being pawed at by a couple of hands. The guy standing in front of her had a perfect position. I could see now that he was very busy running his hands up and down my wife's body. His hand had been one of the hands fighting for access to her tit.