WARNING: Graphic images. A lorry driver caught the shocking scenes on camera in a HGV area at a motorway services.
In the video, the woman can be seen in the back of a seven-seater people carrier, although she has left the vehicle's door wide open and is in full view of passers-by.
He appears to check for onlookers several times, glancing over his shoulder before turning his attention back to the car.
The clip has been uploaded to Facebook although the identity of the filmmaker remains anonymous.