Question: Why did Margaret Stewart, Countess Of Angus's father die?
Sentence (from "Margaret Stewart, Countess of Angus"): By an illicit affair with William Douglas, 1st Earl of Douglas, husband of the Earl of Mar's sister, she became the mother of George Douglas, 1st Earl of Angus (c. 1380-1403), and secured a charter of her estates for her son, to whom in 1389 the title was granted by King Robert II.
Relevant evidence: No