If it hasn’t been that obvious that Susan Portnoy is KassandraSeven, all it takes is one of the Ops appreciating that the other has been unmasked. Usually the Ops that do this are the account owners behind SlimJim AKA the Fish, and Octopus_teach, because they don’t think things through as clearly.
Susan Portnoy being a respected public figure once upon a time, should be worried about bigger things than lawsuits as those take years. Sure Fish is fine with Susan taking the fall as he is a small fish and she one of the larger ones.
Being part of aligned two-sided Ops meant to get people killed, even if she failed to recruit enough Communists for that to have succeeded, are investigated within the expanse of the much larger interconnected picture of all the Ops her cohorts pulled off successfully. Why? Because that is how criminal conspiracies work.
Oh, and Fish accepts Susan Portnoy as being KassandraSeven, because he is a coconspirator.