Dream about someone doing witchcraft on our house

I had a dream where I was at my grandma's house because I am. In the dream it was late, I think like early in the morning like around 12am I think. A tall woman stood outside the door she was taller than my uncle who's over 6'0 tall. She was dark skinned and wearing either a black or white dress she was also wearing gloves and had curly hair a past her shoulders. In the dream, I remember thinking about how beautiful she was. She stood out side and asked us to open the door she was polite and didn't scream at us or act irritated or angry, she was just kind and had a smile on her face. I think I got chills in the dream when she spoke. My grandma said do not open the door for her and keep it locked. When my grandma said that she walked out of the gallery and went to the side and back of the house where my grandma's plants are and sometimes she was bent over them like she was doing something and sometimes she was just standing near them just watching and after she's done she just comes and walks in the gallery then back to the plants. My grandma said that she's doing witchcraft and to not open the door for her after and that we'd have to move our slippers because she'd do it on them too.

When I asked my grandma she said that someone is doing witchcraft because people envy her

any thoughts????