Why does Mrs. Grangerford clean Emmeline’s room herself? (CH 17-19)

Emmeline passed away when she was just a young girl. Her family kept her room exactly as it was, and her mother took care of the room herself in memory.

They kept Emmeline's room trim and nice, and all the things fixed in it just the way she liked to have them when she was alive, and nobody ever slept there. The old lady took care of the room herself, though there was plenty of niggers, and she sewed there a good deal and read her Bible there mostly.