Stand a bit closer.
From Create Your Own Story
You get closer behind Victoria, letting your member rub ever so slightly against her ass. She straightens her back and turns around, flashing a deviously cute smile and mouthing 'go' with her lips. That is more than enough for you. You begin to rub your penis up and down on her ass, trying to be discreet. The crowd that surrounds you masks your actions, so you pull your dick out of your pants and stick it between her legs and thrust. Victoria realizes what you're doing and looks panicked, but all it takes is a finger to her lips to shush her up. You can feel yourself about to come when she puts her hand on your dick and begins to stroke, slowly at first and then faster. A wave of pleasure ripples through your body as you come on her hand. Victoria looks at you and lifts her hand up, licking all along the side. Just seeing that almost makes you cream your pants again. She whispers "Pay me back at lunch".