Question: Which American-born British socialite was Montagu Porch's stepdaughter, and Randolph Churchill's wife?
Sentence (from "Lady Randolph Churchill"): Lady Randolph Spencer-Churchill, (née Jennie Jerome; 9 January 1854 – 29 June 1921) was an American-born British socialite, the wife of Lord Randolph Churchill and the mother of British Prime Minister Sir Winston Churchill.
Relevant evidence: Yes