In some of her more recent pics she had a bit of a belly right above where her 6 pack would be I'm thinking they used the consistent background to photoshop her midsection and arms to be smaller, since you can't distort the greenscreen behind them. I would not even be shocked if this is why gloria decided to take the picture there.
You can still kind of see what I'm talking about in that pic, if you get rid of the top half of the picture she looks like a petite girl that just started showing her pregnancy.
But it might just be a combination of recent good/bad pictures too.
Look at how thin her arms are.. in most of her pictures she looks like a normal sized person, in those she looks unusually thin and skinnyfat on her arm even though we know she works out.