Ooooh,Jem, you're so scary!
I agree she's quick-witted, and maybe that's partly why I think she was misinterpreted - because her very first reaction, before she started arguing, was clearly shock and not-believing. I don't think that was put on. But who who knows? She's a very unreadable person - she keeps a very tight barrier around herself.
(This is why I love BB - all the psychology - and WHY haven't they got that accompanying show they used to, where they analysed the housemates each week?).
Susiex