I think she wanted her last chance to look pretty with her hair done and makeup on before she goes off to prison to hopefully get some marriage proposals like Scott Peterson. She can line up her conjugal visits and maybe possibly get knocked up by a deputy in the prison.
She didn't look pretty at all though. You can tell how much jail and time have muted whatever looks that she thought that she had to begin with. If she's considered pretty, then I am a Victoria Secrets model. lol (and I'm not):facepalm: