Concubine

For a man to dream that he is in company with a concubine, forecasts he is in danger of public disgrace, striving to keep from the world his true character and state of business. For a woman to dream that she is a concubine, indicates that she will degrade herself by her own improprieties. For a man to dream that his mistress is untrue, denotes that he has old enemies to encounter. Expected reverses will arise.

Source: G. Miller, 1901