She is collaborating in the sense she’s been doing everything he’s instructed, but with things going increasingly wrong, it appears the villain is using her for some secret plot she isn’t aware of.
Of course, The Flash audience knows that Nora is likely being duped by Reverse Flash rather than a collaborator in some plan.
We have yet to find out what that plot could be, although one would think it’s tied to the potential game-changing crossover “Crisis On Infinite Earths.”