Although she isn't the brightest spark she's quite quick to pick up on both the mood of the house and perhaps more importantly how she suspects people are being perceived on the outside.
So on Monday she felt that ostracising Tiffany was the right approach but now that people in the house are starting to cotton on to John's manipulation, she is sensing the turning tide and how he is coming across to the viewers.
It's a certain type of cunning that comes from living your life in front of a reality TV camera for long enough.