I think a big part of the context of this story lies in black culture in America and the Cultural appropriation of black heritage. The divide between black and white America is certainly a motif used throughout the story. Ma's story is rooted her background connected with slavery and servitude of her grandparents. Dee's identity involves migrating away from her true heritage to a heritage that has been sanitized by the white world. A story about a white mother and daughter might have a soco-economic imbalance to it but it would not exist within the same cultural context of this story.