Those lovely eyes
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I see the nice eyes, and they are sharp and all, but the facial expression of the child is not very charming, and neither is the adult's. Children change expression and mood constantly, so waiting for the right moment usually doesn't take long.
I would advice you to bounce your flash, especially when using telephoto lenses. The on-camera flash does not do the pretty child justice.
The hair blends into the black background. There are ways and means to avoid this, I would suggest you use some of them.
I am sure it is a lovely child, so I would like to see some lovely pictures of it.