Final answer:
Mary I, daughter of Henry VIII and Catherine of Aragon, was the sister of King Edward VI who was married. James I succeeded Elizabeth I, who died without an heir, and Anne, the sister of Mary II, was the last Stuart monarch.
Step-by-step explanation:
The sister of King Edward VI who was married was Mary I. Mary was the daughter of Henry VIII and his first wife Catherine of Aragon, and she became queen after Edward's death.
Elizabeth I never married and was succeeded by James VI of Scotland, who became James I of England. Although not directly related to the question, understanding the lineage is crucial when discussing the English monarchy. James I's belief in the divine right of kings led to significant tensions with Parliament, which characterized his reign.
Lastly, Anne, the sister of Mary II and daughter of James II, succeeded to the throne after William III. Anne was the last of the Stuart monarchs and upon her death, the succession passed to the Electors of Hanover, starting with George I.