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I don't usually ship Holmes/Mary/Watson, but "Marriage à Trois" was absolutely brilliant! I could absolutely see why Mary loved Holmes, and why Mary loved Watson, and why Watson loved Holmes, and so on. The plotting was carefully paced, allowing us to see how Mary figures out that Holmes and Watson are in love, and when she starts falling in love with Holmes herself, and how they finally get together. I could actually tell that this was a fanfic of the movie and not the book, which is unusual and a sign of careful characterization.
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