Struggle

He was boldly and shamelessly rubbing her pussy, yet she wasn't able to forthright come out and stop him. Where was her usual spunk? Was it because of the shame she felt for being touched like that in public? The embarrassment of letting people know of this? Or maybe something else?

It didn't matter. Fact was that the bolder the molester was, the more he curbed her will to stop him, reducing any resistance she might have put up into a weak struggle to slip out of his grasp, a futile effort due to how cramped the train was and how shameless he was, unwilling to remove or even stop his hands from massaging her cunny.