The mama I never had

When I was twelve years old, I spent a whole night alone at my dadi's village house.
Before going to sleep, she had cautioned me saying
"If you hear bangles at night, do not open the puja room."
It was about 2 AM when I woke up to hear the bangles of a woman clinking near my puja room.
And I heard it approaching.
Then I heard a woman call out my name.
I was scared, but still I went downstairs.
The door of the puja room was partly opened.
Then I saw  a woman wearing a red saree with long flowing hair touching the floor, she was facing away from me and sitting on the puja room stool.
Then she murmured:
"Beta... paani?"
I climbed up stairs and remained there till morning.
The next day when nani returned, she asked me only one question:
"Did you give her the water?"
I said, “No.”
Dadi seemed relieved and said, "Good. Your Mama (moms brother) answered her once…"
I was confused “Dadi, I don't have a mama?”
Once I went back home I asked my mom if I had a Mama, she looked startled. she called my Dadi and had a conversation in another room.
Till date I have no answers and at this rate I might never have any.