He confirmed that Emilia died around 8.20am on Friday during a routine walk around the hospital.
She was 33 years.
Williams told Punch: “My sister died yesterday at about 8:20 am. She had an appendix rupture. The appendix had a small lump underneath it and that lump burst; that spleen went to her intestines and it polluted some parts of her intestine. She had to go through a surgery to cut the affected part of the intestines. It was successful as it was done by a specialist.
“Yesterday, she was about to take her normal morning routine stroll and that is how she slumped; before we knew it, we had lost her. She was in hospital for about nine days. Immediately she learnt that she had a ruptured appendix, she went for the surgery the next day. The next morning the surgery was done and it was successful,” he said.