Dreaming of having affair with boss is a kind of warning as per dream meaning and interpretation. You can expect to see important plans of yours go awry soon. The dream is asking you to use honest and truthful methods to achieve your goal and not to use shortcut and deception.
Dream of having affair with boss and you are happy means you will soon be able to impress other people at work. It also means you will cunningly overcome people and problems.
Dream of having affair with boss and you are unhappy or tensed means you will soon face difficulties in your married or personal life due to another person.
You dream of someone else having affair with boss means you will face increase in enemy activity. Someone might try to take your position or promotion.