No words exchanged, just a silent, hungry agreement. She parts her lips, inviting him in. He accepts, his thick, hard cock sliding into her warm, wet mouth. She takes him deep, her eyes watering as she fights her gag reflex. He grunts, his hands fisting her hair, guiding her pace. She sucks, her tongue swirling around his sensitive tip, tasting the precum beading at the head. The metro rocks, the sounds of the city muffling their panting breaths. She pulls back, her lips glistening, before diving back in, determined to make him come undone.