It seems like she just cares about Frank and not being rich, but her reaction to Blake's dead body wasn't just to calm.

Furthermore how is Frank supposed to just go to that meeting and get out alive? He had an impressive shopping list that he gave to the Armenians, but he'd need serious muscle to even attempt to pull of a robbery at that Catalayst/Russian mob meeting. I also noticed he was making deals with the Jeweler to exchange dollars for diamonds, are the blue diamonds going to come into play or is this just Franks way of cleaning the 12 mil he's about to steal.