Hostile working enviroment

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: I am a male supervisor and I am having difficulty with a female supervisor of equal standing.  This other supervisor constantly is making unfounded allegations and statements that she is discriminated against by the male supervisors, and is left out of the loop.  She is active on our agencies affermative action committee, so if this was the case, she knows how to file a complaint, yet she does not.  Some of these allegations are directed at me, and I find this to be offensive and unprofessional.  Any recomendations?  What is my recourse?