Say... "Mama"

This few day my son can call me already. But he was not call me mommy or mama, he will call "mamak". And he can call his father too, not daddy, but he will call "bapak". Oh My God ... (*shake head*)... How come ?!???!!! Hmmm..., maybe he know that his mom was born in Medan and his daddy came from Javanesse family.... Hahaha...