I knew a girl when I was first working who was actually quite pretty, but her daddy was a very tall, big boned man and there was no question that he was her daddy!
Slouching around with her toes together and trying to shrink into herself did nothing to make her look smaller, and it made her look very unattractive and unprofessional. Same goes for Michelle.
Her fashion sense is pretty much nonexistent, but a lot of her problems would be solved instantly if she would just stand up straight and smile, for Pete's sake!
A slight heel on the shoes and a more put-together look would help too, but posture and poise have to come first. In her present state a good Chanel suit would look bad on her.
It reminds me of a scene from the series Rome, at a party where someone comments to Atia of the Julii how pretty her daughter Octavia looks, and Atia says “Well, I try, but she WILL slouch.”