[Chris Saper]

Dear Clive,

I doubt this is the answer you are interested in, but this is a case of sow's ear, silk purse. This photo lacks every possible element you will need to create a successful portrait: lighting, composition, color, and value. Cropping and background treatment can't rescue it.

I know how difficult it is to say "no", but I recommend you do so anyway. This client is talking to you about a commission because she believes you have an expertise she does not. Offer to take your own photos; offer to go through her albums with her; send her to a photo resotoration expert. You will come to regret it if you proceed - this I know from own experiences, recalled with great mortification.