I think Ariana will try and play both sides. She and Katie have become close (if not business partners? say, what is happening with Something About Her, anyway?). But I think your Team Katie rank and file is correct -- all those people are fierce loyalists who do not like gray areas, so that sounds right

I can't tell if this is a planted story to drudge up a plot line for the new season, or the natural turn of events post-divorce, but Raquel said that the cast feels the need to pick a side between Katie and Tom following their divorce. 

She told Page Six: “I feel like with Tom and Katie, they do expect [people to pick] sides, unfortunately. It has [changed the dynamic], yeah. It seems that way, anyway – even though I’m friends with both of them.”

https://pagesix.com/2022/05/31/vanderpump-rules-cast-forced-to-pick-sides-in-tom-katie-divorce/

The question is... how will the sides shake out? This is what I imagine:

Vanderpump cast feel they have to "pick sides" between Tom and Katie

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News, commentary, theories, and exclusives about Bravo's 'Vanderpump Rules,' a reality series about the men and women of Lisa Vanderpump's SUR.