Concubine
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In 5,000,000,000, Jabe wondered if Rose Tyler was the Ninth Doctor's concubine. (TV: The End of the World)
Queen Mary I called Elizabeth "the concubine's daughter." (AUDIO: The Marian Conspiracy)
One corrupt Bishop who was present at the First Auction in Heaven had several concubines leashed to his belt. (PROSE: Going Once, Going Twice)