In Korean tradition, dreaming of my mother is read as auspicious. It is most often tied to 가족, 전반.
The mother is protection and origin. Her smiling appearance was read as reassurance and help coming; a late mother appearing, a message worth heeding.
Tradition reads the symbol as an omen; psychology reads the same dream as a mirror of your present state. Describe your dream and both readings appear together. Interpret your dream