Thank you so much Joan, George and Mike.
I agree about softening the contrast between her cheek and the background, I will try a combination of softening her cheek and reducing the contrast between them and see what effect that has on it.
I am now realising that the parents wish to reduce her puppy fat is what is giving me the real problem regarding her likeness and I am inclined to add a little more puppy fat to her and hope that parents approve. If they don't approve, I can show them the above photo to demonstrate the problems that occurred when their wishes were carried out.
After all, her puppy fat does not take away her obvious childlike beauty, she is a little angel!
I will place her back on the easel and work more on her in the next few days.
Thank you all so much for your help and advice on this, it is very much appreciated.
Take care,
Barbara