Mixing Business With Pleasure

Ok so I work at this food joint downtown in my hometown and since I've been away at school there have been new faces coming and getting hired and so I got the opportunity to work with a few last weekend and this weekend and I noticed that one of them is fond of my boss and my boss is fond of her. But my boss is married...and has four kids which I all know who they are cuz two of them work there. And I've met his wife and I know people in their family because it is a family ran business and some of their relatives go to my church and Im like wow. Everybody in the restaurant knows that they are low key messing around and nobody says anything. I know Im not going to say anything but what in the world is going on. This girl gets her food free and privileges that we as other co-workers cant get all because she's allegedly sleeping with the Owner/Boss. That is not tight and not cute and I think its crazy how everyone is turning the cheeck on this matter.