He calls me MaMaaa ... Ma!
I place him in the playpen and when he wants me to carry him, he will call out MaMa .... Maaa. I always ask him to call me first before I carry him. I say, "Call me MaMa, then I will carry you" or "Call MaMa first, then MaMa carry you."
When Daddy asks where is MaMa? He will point to me. When I carry him, I ask him where is MaMa, and he will pat on my chest or shoulder. When he is on our bed playing with Daddy and sees me walking into the bedroom, he crawls towards the edge of the bed (of course with Daddy being the guard rail) and shouts MaMaMa. I am on cloud nine now. My son calls me MaMa! He called me first. Luckily, Daddy is not jealous.