Dreams that include your mother can be extremely varied in meaning depending on your relationship with her and particular situations at any given time.
Did you perceive your mother as omniscient and all-loving at a particular phase of childhood?
Has your mother's relationship with you included power struggles or inappropriate intrusions into your affairs?
Have you lost contact with your mother (either by death or by choice) and left some issues unresolved?
The answers to these questions will help decipher many of the images that appear with your mother in your dreams.