Complete Dictionary of Dreams
by Dr. Mıchael LennoxIf someone appears in your dream and is indeed identified as either your or someone else’s mistress, that person is a character aspect of your own personality.
The representation here is about the desire to connect to intimacy without emotional risk.
My Dream Interpretation
by myjellybeanIf you are single and have this dream, it suggests that you or someone in your circle is being lured or tempted into some negative activity.
To dream that you are someone’s mistress indicates your desire to get things without working for them.