This lady's name is Anna and she has been set a challenge by her friend Julie who believes that Anna cannot perform a convincing fake orgasm. 
We join the scene as Anna sets out to prove Julie wrong while lying flat on her back on an office desk and remains there throughout the video. 
It will be one continuous shoot in real time.
Keep the camera zoomed in to her head and just below her chest only. Do not zoom out to show more of the scene.
Please make sure that the video lasts 10 seconds
No subtitles
Make her performance serious and NOT comical
To add to the effect Julie (off screen) is pushing and pulling Anna by the ankles backwards and forwards along the desk by around 2.5 centimetres
No words, only sensual sounds

Both her hands contribute to the action (she drops the bag)
Keep the desk totally still throughout the duration of the video. We zoom in to frame her head and chest and as we do her hands stroke her dress   While all this is happening she's whispering in a London English accent "oh Frank, please don't stop" "right there" "that's it, you're incredible"