Conversation so far:
What was the second marriage of Wallis Simpson?
Wallis had become involved with Ernest Aldrich Simpson. He divorced his first wife, Dorothea, to marry Wallis on 21 July 1928.
How did Wallis Simpson meet her second husband?
By the time her marriage to Spencer was dissolved, Wallis had become involved with Ernest Aldrich Simpson.
Did Wallis Simpson's second marriage last?
Wallis filed for divorce from her second husband.
When did Wallis Simpson get divorced from her second husband?
The decree nisi was granted on 27 October 1936.
Can you give me any interesting information about Wallis Simpson?
The Simpsons temporarily set up home in a furnished house with four servants in Mayfair.
Did Wallis Simpson and her husband stay in Mayfair?
In 1929, Wallis sailed back to the United States to visit her sick mother.

Question: What happened to her sick mother?
Self-contained rewrite: What happened to Wallis Simpson's sick mother?