Unsure about this. My "Mother" or My "mother"

Question

Sorry, I am seriously blanking out... but if I want to say my "MOTHER" then would it be my "Mother" or my "mother"? Would it be a lower case or a higher case M? Please say specifically, depending on any situation where I want to write this.

for example:

"Hello mother/Mother"..

"This is my mother/Mother"

"My mother/Mother told me"...

Answer 1

mother is in lower case, but not for nuns

hi mother

this is mother

my mother said

Answer 2

lower case unless it is part of her title such as Mother Teresa.  

"h**l mother."

"This is my mother."

"My mother told me"

Answer 3

"mother", as a noun, "Mother" when you're using it as a name, as in:

"I'm sorry, Mother, my friend's mother wants to know if I can play today"