Spanked In Public by Selena Black

Sadie has always fantasized about being dominated, but her timid boyfriend never seems to want anything but boring relationship sex. That is until one morning he wakes up with a morning suprise for her, and some gentle teasing is able to coax out details of the dream that got him in the mood.  In a cab ride later that night, Sadie decided to see just how far her boyfriend is willing to let her go to fulfil his fantasy - which results in the cabbie pulling over in a public space with bad intentions.