my machine is down while reorganizing the house but here is my assessment, maybe it will help....do forgive my lame descriptions, I am still transferring traditional skills into the digital world.
The little boy seems to be very similar in features to the lady who is seated,
I would try playing around with "stealing" one of her eyes and playing with the free transform thingy. Same thing with his ear, I would use the existing one to re-create the other.
There is enough of the jawline intact to be able to re-create the missing area,
I think there is a tutorial on "painting" in the tutorials section.
Same goes for the eyebrows, I can just make out enough of them to be able to determine what they would look like. (but then again I draw too).
Maybe getting together with a friend or family member who is an artist may help as well.
Looks like much of the rest can be done with the clone tool.
I know it's not much help but hopeful it helps a little bit
