She just thinks he's on some launch night secret task:
http://www.channel5.com/bigbrother/a...s-got-a-theory
"What game? Why, the game Michael's playing. Sallie thinks that Michael is a normal run-of-the-mill housemate who was given a secret moley mission on the very first night. She has presented her case to the House, and told Michael "I really like you and I can't wait for this game to be over so you can be yourself again."
Oh, Sallie. Close. So very close. But no cigar."