Belle Noir (legal name Sarah Cunningham) is a best-selling author of erotica novels and seasonal resident of Provincetown. She is a character in Double Feature portrayed by Frances Conroy. Five years ago, Sarah Cunningham, or "Belle Noir", is a self-published author; she is not well-known nor particularly successful despite her talent. Her most recent work is a piece of erotica tilted Martha's Cherry Tree, a risqué take on the marriage of George and Martha Washington. Seemingly, Belle uses…