How Much Does Sheila Know?

Sheila is constantly claiming how she's never watched an episode of Big Brother and she had no idea people were so mean to each other.

Yet I constantly find her telling other houseguests specifics about what has happened in past seasons.

I think her big secret is she has watched Big Brother.

Dun Dun Dun.

Edit: Nat just said she wanted to get her boobs done again in ten years and was going to go to Dr. Will. Sheila responded with "He only does faces." Dr. Will is a cosmetic dermatologist.