Keep on rubbin'!

As the young girl realizes what I'm doing, she looks somewhat shocked. She turns away and leans against the handrail again, but it doesn't stop me from playing with myself. She tilts her head and looks up at me and I shoot her the biggest grin while contiuning to rub my erection. She giggles, which I took as a good reaction, hoping she doesn't start calling for the cops or something crazy like that.

Her eyes quickly move from my eyes down to my crotch, and back to the side. Every few seconds, she'd shoot me another look, and I'd just keep going. My cock was hard as a rock by now, and I definitely wanted to do something about it. What could I possibly do though, without actually molesting this girl?