I use Photoshop professionally and I would say that there is a very high chance that this photo is “shopped,” except that this is such a low res example it is tough to really say for sure.
Some things that stand out:
1. Lower right edge of her dress. That dark line is different from what you would expect to see and could be the remnants from something that was in the her original photo (a dark background on original in that area).
At first I thought that it was just the seat support behind her (and it could be up to a point), except that the dark line extends to her foot.
2. Black, or gloved, hand. Simply put, humans have pretty regular conformations and the human forearm is roughly the length of a person’s foot. The forearm in this photo is grotesquely elongated.
Even if she were wearing a sheer-typed glove, her forearm is too long to fit with the hand as it is positioned in this photo.
3. Something that may be hard to explain, but immediately jumped out to me is that if you printed this photo and then took a straight ruler and placed it along the edge of the top side of the white wall in the background you would find that it is straight all of the way across.
If you place the ruler on the lower edge of the white wall you will find that the left side of her dress is raised up slightly and not in line.
It’s just odd.
4. The lighting isn’t quite right on her face, but that would be hard to judge unless you know how the light is getting into the room (windows, glass, &c.?) and if something were blocking it in places.
5. Hair. The hair above her left shoulder appears to “fade” away. Hair does not do that in reality, but it often does it in bad photoshopping. Hair is often a tale-tell sign.
It would be nice to have a higher res version to see better - especially her hair.
I’ve been using photoshop every day since 1991 and I don’t see anything funny about the photo (given the low resolution).
Put an exposure layer on and run up the gamma. I see no mismatch - as you would expect in a composite.
Put a hue/saturation on and run up the saturation. You will see her previously invisible reflection in the floor.
As others have pointed out, her hand in no darker that grandaddy’s arm in shadow.
I say this is a wild goose chase.
Good catch on your number one. I hadn’t noticed that.