Its an interesting thought, though I wonder what she would be trying to leverage out of Callista using Kane to make Callista stay in hiding.
She is always scheming as you pointed out with her call in the prison figuring out what to do about Kane. Also her plan to pit her sisters against each other.
Also whatever she is playing at with this in the sub route of 8.2
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The Otto mention with secret meetings implies she knows about the revolution, and maybe also just concerned about Decock affairs in general. But it is interesting that she absolutely doesn't want Veronica or Dominique to get more info.
Edit because I forgot a couple images i between about secret otto meetings