This is a long journey for him from simplly saying mama without any meaning to him and you to meaningful and purposed mama with looking at you and waiting for your response.
It was yesterday noon. He climbed onto the sofa and leaned to the back as usually as before when I was having my lunch. Mama. I responsed to him like before. But this time my response seemed to mean something to him. He began to realize that I liked to hear his calling? He kept saying Mama to me. That voice was so moving. You can feel all his love to me. Tears almost came out. How joyful!