Ngozi Fulani tells the BBC her encounter with Lady Susan Hussey was like an "interrogation".
The prince's godmother resigned after repeatedly asking a black British charity boss where she was "really" from.
Woman, 85, endured "agonising" wait, with paramedics warning problems likely to worsen.
Prices fell 1.4% in November as higher interest rates put off buyers, Nationwide says.
Julie Davis tells the BBC she wants more information from the investigation to find her son, Levi.