I guess booze and hard drugs hit her petite frame hard.Wikipedia page mentions her once 19 inch waist, sure it is exaggerated, but still she probably was anorexic, which took toll on her body.It is hard to believe she was 45 during Scarface.
Well her look was perfect for the role, thin and all. Not sure if it was intentional and part of a "method acting" strategy. Here is another photo of her at an older age where she has more weight.Or do I have her mixed up with someone else? On some sites the "Marta" actress is listed as Barbra Perez. And then on others Barbara Perez. IMDB also does not list Scarface under Barbara Perez, but does under Barbra Perez. Looks like it could be the same woman though...
My mother-in-law is a train wreck, there is nothing in her existence resembles her once cute and slim features, so this once adorable lady may very well turn into inglorious latina maid.