Andromache in Frederic Leighton's painting does not look very sad, however, the surroundings of her look extremely sad, and the whole story too. Leighton shows her standing alone, dressed in dark clothing. My feeling is, the parts that hurts or supposed to be sad is how everyday life continues around her. Not caring much about her war or tragedy, and she herself have to carry on to continue living, she can not even stress enough sadness, you can't maintain genuine sadness for a long time, even if you wanted to. Related: Oh fuck, you're still sad?