As I have understood it, "don" is not generally something you put in a box with a bow and give to your chouchou; it refers to natural talents or abilities given you by your heredity or a Higher Power. It might refer to wealth, but more likely the inherited kind. If somebody has a better definition, please share.
This sentence would not be used with any of these meanings.
Elle connaît le montant/la nature de son don = She knows the amount/nature of her donation.
Elle connaît le montant/la nature du don qu'elle reçoit/va recevoir = She knows the amount/nature of the donation she is receiving.