nice job on a difficult image!
there are a couple nit-picks i'll give here. his hair... looks like some clone marks there.
his hand... what is that white between his thumb and forefinger? is that part of her hand or what? if it's a smudge or stain, remove it. if it's her hand, make it more clear.
and as a personal choice, not necessarily a mistake or omission, i think i'd have left the background darker, masked it off and done the lightening on the rest of the image like you did. the reason is, when you lighten a dark area like that that really has no discernable detail or contrasts, it makes the area that sort of cloudy white/dark which looks like the image wasnt fully restored. i hope that makes sense
but despite the nit-picks, excellent job!