It seems to me that his fingers are just curled around hers (but I'm another person who doesn't have the best eyesight in the world).
Anyway, I increased the image in size using the 10% increase each step (I hope, because that's supposed to be a better way to increase size). I adjusted the contrast with Curves, removed some of the off-color pixelated areas using Selective Color, and adjusted the angle of one of his fingers a bit using Transform. To my eye, it helped a bit.
If you can get the actual photo to scan, you could scan it to a larger image size.