I didn’t notice the food on her plate... eating all alone!
Or she’s too mean and self-centered to wait for the others to get there.
Or she’s mad they’re late and is trying to make a point.
That’s a big table full of place settings... I think she was stood up by family scheduled to meet her there.
Or it was a staged picture for sympathy. Notice her napkin must be either in her lap or on the floor since it’s nowhere in sight, and all the other water glasses are not filled, but hers is.