Let's see... She is not a member of the military. She is not a subordinate over whom, he has command. She is not the spouse of a service member under his command. She is not a member of the civilian chain of command.

I don't see an issue here. He commanded the Cookie Division. If he did it well enough to be considered for third star, letting some stupid staffer to a nobody congressman is about as bright as move as taking Third Army away from Patton because he slapped some drooling idiot in a field hospital.

Sometimes, the Army just needs to not to just tell people "You got your feelings hurt. Get over it. We have bigger concerns to deal with".