If I am understanding you correctly then she was reading something whilst the engine was running?
If so that is driving without due care and attention.
I would imagine that they are alleging some form of bad driving as well though.
Any motorist can pass CCTV to the police.
Whether the police will be interested is another matter.
They could prosecute on that evidence though.
Can I clarify anything for you?
Yes, you are still driving even though the car is stationary.
They don't use a fixed penalties with driving without due care.
Yes, but she can plead guilty by post.
Probably just 3 points and a fine but it would be higher than the fixed penalty.