1. Write it in ways that, if she suddenly changes her mind, you can remove them ASAP. (Simplest would be to NEVER give it any spotlights. It's a thing of the era, so it should be just natural passing remarks and stonewalling, but you won't have KKKs hunting down your PC in every corner. Do remember that back then most people thought they were doing a "decent" thing, and decent people didn't tend to mob people without cause or have mouthful of racial slurs all the time: They stayed away, and kept away, cause it was how it's "supposed to be".)
2. It's more to do with Players than PCs: It's like the "African Americans can call each other the N-word, but not you" troupe: If everybody feels comfortable with it and you don't have someone who would post the log afterward just because they wanna start something, do every single satanic thing you can think of and more, and it'll be easy as breeze.
Just make sure everyone really understands it beforehand.
(And if even only one person don't want it, drop it like a hot potato ASAP. Things like these go with the minority ruling or it tend to get f__ked up real quick.)
