Bree discovers who dug up Gaby's stepfather and is shocked; Lynette lies to Penny about Tom's new girlfriend; Susan searches desperately for her artistic muse to impress her hard-to-impress art teacher (Miguel Ferrer); and Lee and Bob think that Juanita and Celia Solis are still bad kids, so they don't want to let Gaby and Carlos name them as the girls' legal guardians in their wills