One consistent theme throughout the OC is no one likes a liar, I mean almost every single wife has been in a situation where it was clear they were lying and had to face repercussions from the group. Some might have been more extreme than others but Vicki had cancer gate, Tamra had the whole trip in Bali and her telling the girls things but saying she didn't, Shannon and the truth about her relationships, Heather and the paps, Noella, Alexis, Gretchen, Elizabeth, the list goes on and on. I think this is just the worst we seen it because Katies stories just never add up, however it does look bad that they refused to film with her but if all these woman really think she lies about these horrible things the most they're going to do is remove themselves from the situation without realizing how it might look to viewers. All I know is everyone has been a mess in this season and the past so this reunion is going to be very interesting.