I have so many opinions on this ... I go back and forth ... Cat's evil, no THEY are, no Cat is ... then I remind myself that editing can do all kinds of things. We're not shown everything that happened, and we're not shown everything in exact order either. I tend to believe that Olinda was vicious, because "You can't edit in something that wasn't there", but we also don't know if Cat's doing mind games by being deliberately rude. She seemed to talk a LOT more when Linda returned.
I'd make such a horrible juror ... !!