Mother Anandamoyi and Shakti Rupini Devi are revered in traditional religion. He descended to heaven in the form of Mahamaya to slay demons. I see mother Kali sticking out her tongue, she didn't just stick out her tongue here , she bit her red tongue with her white teeth. Here the color white symbolizes the essence. The color red symbolizes Rajo Guna. To bite the red tongue with white teeth means to suppress menstruation with sattvaguna. Many people say that mother Kali drank blood because her tongue is red. If you drank blood, there would be red blood on your teeth. Why would a mother drink a child's blood ? Many say he bit his tongue because he was standing on Shiva. Shiva says if he gives me strength then I am Shiva otherwise I become powerless Shiva corpse (dead). So he is under his mother's feet. Everything is under power. Raman of the superpower with this Mahakala , so she is the mother Kali.