I guess it depends on what it actually means, and the reason for the statement.
My first thought was that some of her statements on how extensive the fraud is, who was involved and so forth require such amazing proof to support them that Rudy and Jenna don't think she can meet that burden of proof.
I think Rudy and Jenna believe she has gone too far in her claims, and they don't want to be dragged down with her if she can't support her claims in court.
I hope that isn't it, but that was my first thought.