Conversation so far:
How many marriages did Lady Randolph Churchill have?
3
How did Lady Randolph Churchill second marriage end?
Jennie separated from George in 1912, and they were divorced in April 1914, whereupon, in a bit of irony, Cornwallis-West married Mrs. Campbell.
Did Lady Randolph Churchill have an affairs?
It was said that Queen Alexandra especially enjoyed her company, although Lady Randolph had been involved in an affair with her husband, the king, which was well known to Alexandra.

Question: Who was her second husband?
Self-contained rewrite: Who was Lady Randolph Churchill's second husband?