Answer:
In a room.
Explanation:
From the poem, we can see that she is in a room, perhaps at night because it is indicated that she came into a room and she was described as kindling the narrator and they "wake up glowing" which could be in a literal or figurative way.
When she comes slip-footing through the door,
she kindles us
like lump coal lighted,
and we wake up glowing.
She puts a spark even in Papa’s eyes
and turns out all our darkness.
When she comes sweet-talking in the room,
she warms us
like grits and gravy,
and we rise up shining.
Even at night-time Mama is a sunrise
that promises tomorrow and tomorrow.
Mama Is A Sunrise by Evelyn Tooley Hunt.
