Eurydice knew her mistake even if she had said it quietly. Some mortals had amazing hearing. She just couldn't not address Persephone or Hades formally. It felt wrong not to. Disrespectful. She felt even not they both deserve respect.
She allowed Persephone to pull her outside. She blushed, feeling increasingly foolish. "Sorry, I.... I just panicked. I saw you and I thought maybe I'd have to go back. Oh. Well I was passing by and felt hungry so I stepped in for something to eat."