I look forward to hearing more of Rita, but I wouldn't make ass-umptions about whose side she'll be on long term. She could easily be a side all by herself.
As mentioned above, PA to the capo di capi is an extremely powerful position. If Simon is wise, he won't cross her. Though the bright side is, she's unlikely to cause him much trouble, just provided she always gets what she wants.
Biting the hand that feeds IT
