Where was Thandi's mother born in the novel, What We Lose?

Thandi's mother is from Johannesburg, and her entire family still resides there. For Thandi and her parents, Johannesburg is a common holiday trip, and Thandi continues to go there after her mother's death. Growing up, Thandi was terrified of South Africa, and Johannesburg in particular, due to the high crime. Johannesburg is also the topic of a blog post that highlights the complex racial dynamics in the city after apartheid.