I realize your request is made several years ago and it is unlikely you will see and get this reply. However, reading your message made me realize I had to at least try.
I did not work with your mother in the hospital, but I was, at the age of 18 - 19, living with your family in Muswell Hill (Au-pair). This was at the time you and your twin sister where born. It hurts to learn about your mother. Your mother was one of the warmest, caring persons I have ever met. Please let me know if you are still reading this post and would like to get in contact.
Christina (Nina) Petersson