OK, I gave it a try.
`First, I adjusted the curves, lightening it up.
`The gum was bugging me, so I used the Sponge tool to desaturate it, and now it's less distracting - it almost looks like her teeth. I also used this tool to whiten up their teeth

`To get rid of the shine/glare, I mostly relied on the Patch tool (it's one of the Healing Brush options) For her forehead, don't select it all at once. I did it in 4 or 5 parts, using the upper right part of her forehead to switch it with. I used this techique on her cheeks, too.
`There were some spots, like on their noses, that I used the Clone Stamp tool on. I set to a low opacity (~40%) and used a soft brush.
`For fun, I also minimized the tan line on Mmagnetic Lasso tool to select the two, feathered the selection, inverted it, and darkened the background.
Hope some of that is useful
