Lady Shay decided to use a sewing machine for her pedal pumping fetish because a car did not satisfy her need for pedal pushing as she had to remove her foot from the gas pedal and apply the brakes. So she used a sewing machine and she would do it as she felt like. It was much better for her and she did not care about doing it in a car anymore.
Lady Shay had never tried pedal pumping before and that is why she was excited to do it today. The mistress knew that for her to do it well, she had to do it in a stick-shift sports car. She wanted all the vibrations that came with it and she prepared for it. The mistress enjoyed herself as she got into the car, revved it, put it into gear and she sped off.