The rules should be the same for everyone

Mosquito has, apparently, become very good friends with a member of our board of directors. They go to dinner, get manicures, and go on hikes together. The board member even tells mosquito details about confidential board meetings. 

We find this problematic. 

As far as we can tell, it violates employee policy about not forming close relationships with people who are higher up in the power structure. To make matters worse, six months ago Mr. Ed received an official reprimand for going out for a beer with a different board member. How then is it okay for Mosquito to be "besties" with one?